how to print enum string in c

Why is enum class preferred over plain enum? In this method, we will implement our function that accepts an integer of enum class as an argument and converts it into a string by returning a string as an output. It is useful, for example, to debug your code, or generate trace messages. We can format and print the result. Well, he may want to output "This my dear friend Luther is Error A or "This my dear friend Adrian is Error B." The second iteration prints out the contents of enum_strigs to console. So external would be very relative. In this method, we will use the stringify() method. What is Catholic Church position regarding alcohol? Sure you can do this, but this is pointless if you're using a variable. Good point. Thank you for your valuable feedback! A nice thing about doing it this way is that you can also specify your own custom messages for each error if you think you need them: If you like making your error codes/descriptions very descriptive, you might not want them in production builds. By using our site, you Enums can be easily used in the switch-case statement. Use the array of strings and the enum to print a string. Do symbolic integration of function including \[ScriptCapitalL]. Understanding volatile qualifier in C | Set 2 (Examples), Structure Member Alignment, Padding and Data Packing, Flexible Array Members in a structure in C, Difference Between Structure and Union in C. How to deallocate memory without using free() in C? 1 enum wind_directions_t {NO_WIND, NORTH_WIND, SOUTH_WIND, EAST_WIND, WEST_WIND}; Note the _t at the end of the name of the type: this stands for "type" and is a way to visually distinguish the name of the type from the name of variables. I use a string array whenever I define an enum: This solution doesn't require you to use any data structures or make a different file. The enum_to_string function is a helper function that calls the enumString function and converts the enum to string. Connect and share knowledge within a single location that is structured and easy to search. It can be declared during declaring enumerated types, just add the name of the variable before the semicolon. printf ("%d",week_end); What's it called when multiple concepts are combined into a single problem? The value assigned to enum names must be some integral constant, i.e., the value must be in range from minimum possible integer value to maximum possible integer value.5. ], Very nice, the only thing that I see as an improvement is using. Then use for example: Solution 2 In a situation where you have this: enum fruit { apple, orange, grape, banana, // etc. As we know that the binary representation of 1 is 00000001 and the binary representation of 4 is 00000100 (representing both in 8 bits). rev2023.7.14.43533. The result string from Enum.ToString can be stored in a string variable or field. These values are defined by the programmer at the time of declaring the enumerated type. The advantage of this approach is that: "Values of enumerated types declared with enum are implicitly convertible to the integer type int, and vice versa. Converts the value of this instance to its equivalent string representation using the specified format. In the above the cast is redundant, because it's using the enumerator. the only way I can think of doing this Hi, In the above code, we can see the conversion of int data type to enum data type. The StringEnum class has static and instance portions and provides the following static methods: Parse : Parse a string value and return the corresponding enum value. These constants, also known as enumerators, provide a convenient way to represent a fixed set of values within a program. Following is an example of enum declaration. How can I convert an enum to a string automatically, how to print hex value of an enum to a string in c++. There has been a discussion here which might help: Is there a simple way to convert C++ enum to string? See my update above. Does air in the atmosphere get friction as the planet rotates? Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned. I have a C++ Testing.hh header file in which I have declared this ENUM -, Now in my Testing.cc class I am trying to print out TestingOne and TestingTwo string from the enum as shown below. In the first step we have created an enum of days, and we have not initialized any variable with any value, so by default, the value taken by MONDAY will be, The convert_to_enum function takes a string as an argument and converts it to enum by checking the conditions in the, Finally, we have used the switch-case statement inside our. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. enums - how to print an enumerated variable in C? - Stack Overflow C++ Trickery : output actual enum, not its value, to_string for enums with user defined names in c++, enum to string in modern C++11 / C++14 / C++17 and future C++20, How can I output the value of an enum class in C++11, printing text-value of enum, not the value. How can I return multiple values from a function? Working with enums provides us efficiency along with flexibility because it does not waste memory. There are a variety of methods to convert enum to String in C++. so this is actually the shortest solution presented here. How does you approach work if you have non-contiguos enums, line 'enum Status { OK=0, Fail=-1, OutOfMemory=-2, IOError=-1000, ConversionError=-2000 }` (so you can later add IOErrors to the -1001-1999 range). Of course, is there a simple way to "step" through enums? How and when did the plasma get replaced with water? sci-fi novel from the 60s 70s or 80s about two civilizations in conflict that are from the same world, Max Level Number of Accounts in an Account Hierarchy, Do symbolic integration of function including \[ScriptCapitalL], Proving that the ratio of the hypotenuse of an isosceles right triangle to the leg is irrational. How terrifying is giving a conference talk? I get string: "My Value: 2", but how can i format the string to get strong like: "My Value: F2" ? enum is a built-in type, which can be used to declare small named integers usually formed as an array. I wanna hook dxgi swapchain present for dx11 and dx9. The following example demonstrates how to convert an enumerated value to a string. Please refer to the same example below for a better understanding. For example: enum fruits { APPLE = 0 , MANGO, ORANGE, BANANA, MAX_FRUITS, }; Step 2: Define constant array of strings as follows. By using our site, you Faced with a problem, element.click() event doesn't work in Safari browser. Find centralized, trusted content and collaborate around the technologies you use most. The provider argument is not used. Is Gathered Swarm's DC affected by a Moon Sickle? The string representation of the value of this instance as specified by format. C# | Enumeration (or enum) - GeeksforGeeks (Ep. static char* enumStrings [] = { /* filler 0's to get to the first value, */ "enum0", "enum1", /* filler for hole in the middle: ,0 */ "enum2", "enum3", .. }; . You will need a static char array (or equivalent (like a switch)) somewhere as there is no built in way to convert enum values (which are integers) to a string. The provider argument is not used. For example, in the following C program both Failed and Freezed have same value 0. 1 Answer Sorted by: 0 Someone please correct me if there is a better approach, but the way I know to do this is with macros. If that's the case then just use a string. compiler settings the size of an enum could Can anyone tell me if it is possible to enumerate through all the Enums within a class . Sign in to post your reply or Sign up for a free account. A Guide on C# enum: Learn to Use a C# String enum - BitDegree.org Shouldn't this array be static for memory efficiency? Just IMHO, of course, [I've removed the unneeded escaping of newlines in the macro invocation. Oct 7, 2019 at 1:59pm lastchance (6976) 1 2 3 4 5 6 7 8 9 This C# method converts an enum into a string. I can't afford an editor because my book is too long! Conclusions from title-drafting and question-content assistance experiments Is there a simple way to convert C++ enum to string? acknowledge that you have read and understood our. We can assign values to some name in any order. How would life, that thrives on the magic of trees, survive in an area with limited trees? Just asking.. How to pass a 2D array as a parameter in C? What does "rooting for my alt" mean in Stranger Things? -1. format contains an invalid specification. I have a table that can contain up to 12 entries for an individual in the number field each number can be different number I want only to add up the top 7 numbers for each individual. In addition, use the enum values for the cases: Hell Yeah, worked too, there is so many possibilities ! ; . and const for safety? rev2023.7.14.43533. For Example: If a gender variable is created with the value male or female. See also. He wanted to use chars instead, argueing that depending on The following method call attempts to retrieve the name of a member of the Shade enumeration whose underlying value is 1. The next Access Europe meeting will be on Wednesday 7 June 2023 starting at 18:00 UK time (6PM UTC+1) and finishing at about 19:15 (7.15PM) I can't afford an editor because my book is too long! BTW, you do not need the Backslashes when using DEFINE_ENUM, which looks a bit more natural, IMO). How is the pion related to spontaneous symmetry breaking in QCD? Difference Between malloc() and calloc() with Examples, fopen() for an existing file in write mode, C Program to merge contents of two files into a third file. cout << "From command" << str(Testing::TestingOne) << endl; Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Using MyEnum as our enum. How "wide" are absorption and emission lines? This. How to print out strings from the enum class in C++? Convert Enum to String in C++ | Delft Stack Enum in C/C++ language also known as Enumeration is a user-defined datatype that is used to assign names to the integral constants. Changing enum to string - C++ - Epic Developer Community Forums unfortunately, enum allows us to assign values to the elements. In this method, we will utilize the default values of the enum to access the elements of the string array. In the same way, if we try to assign any other value to the enumerated data types, the compiler generates an error. Also, using map removes the dependancy on iostream signatures, such that he is free to use it elsewhere in the code with string concatenation for example, string x = "Hello" + m[ErrorA], etc. All right, I may be a little overly dramatic here, but this is an issue many C++ developers encountered, even the most casual ones. This won't work for something like an enum of bit masks. 1 Like UnRealper (Unrealper) August 21, 2022, 9:22am 3 I want to print out every time a different StaminaStatus. The method can return either "Gray" or "Grey", and your code should not make any assumptions about which string will be returned. In the above code, we can see the conversion of enum data type to int data type. There are couple of ways to print the enum. And who? There are couple of ways to print the enum. Denys Fisher, of Spirograph fame, using a computer late 1976, early 1977. If multiple enumeration members have the same underlying value and you attempt to retrieve the string representation of an enumeration member's name based on its underlying value, your code should not make any assumptions about which name the method will return. 2) A trailing comma can follow the enumerator-list. MyEnum me = F2; printf ("My Value: %d", me); . The enum keyword is used to declare an enumeration in C/C++. In switch-case statements, evaluation falls through between the cases. Using Header File "stdbool.h" To use bool in C, you must include the header file "stdbool.h". In above syntax, Enum_variable is the name of the enumerator, and string_1 is attached with value 0, string_2 is attached value 1 and so on. Next time I will :) But now I see that you've already edited your post to add the kind of functionality I was looking for. I'm sure std::map contains a lot of if's and switches. Why did the subject of conversation between Gingerbread Man and Lord Farquaad suddenly change? Is iMac FusionDrive->dual SSD migration any different from HDD->SDD upgrade from Time Machine perspective? It will work perfectly with the enum in the question. I can't i have been toying with the idea of making my enums smarter - ie, more Here#s a script for Lua which creates an operator<< for each named enum it encounters. This code is used to convert a C++ enumeration value to its equivalent string representation. Hereby mistake, the state of wed is 2, it should be 3. Thanks in advance for help? Can Enums in C# be UInt32 Types, and not just Int32 Types. The following code reveals the way to manipulate the type of elements: enum grades : byte {A, B, C, D, E, F}; Here is a list of C# enum types that can replace int: sbyte byte short ushort int uint long ulong If you need other options for the conversion of C# enum, string is also a possibility. 1 This question already has answers here : Easy way to use variables of enum types as string in C? You will be notified via email once the article is available for improvement. Below is the implementation of the boolean in C: C #include <stdbool.h> So the xor of both the numbers will be 00000101 which is 5 in decimal representation. This mechanism provides a less error-prone and more readable way of representing a set of integer values. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. Historical installed base figures for early lines of personal computer? to click and have it "cycle" through a set of states defined by enums but US Port of Entry would be LAX and destination is Boston. (20 answers) Closed 9 years ago. Then use for example: cout << "From command" << str (Testing::TestingOne) << endl; enum flag {const1, const2, ., constN}; By default, const1 is 0, const2 is 1 and so on. An enumeration is (re)declared using the following syntax: 1) enum-specifier, which appears in decl-specifier-seq of the declaration syntax: defines the enumeration type and its enumerators. @Laykker It's probably not what you want. Here's an example: In C/C++, case statements fall through. Enumerators can be created in two types:-. UPDATE: Here#s a script for Lua which creates an operator<< for each named enum it encounters. Format(Type, Object, String) Formatting Types in .NET; Enumeration Format Strings On each tab there is a subform. Exercise:Predict the output of following C programsProgram 1: Enum vs MacroWe can also use macros to define names constants. Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned. How to Print Name of Enumeration Values in C Programming Printing an enum value can be tricky as the sizes of each of its members can vary depending on the implementation. To define enums, the enum keyword is used. Convert enum to string in C++ - Java2Blog Distances of Fermat point from vertices of a triangle. Then try to pass a code review :). See my update. If the FlagsAttribute is applied and there is a combination of one or more named constants equal to the value of this instance, then the return value is a string containing a delimiter-separated list of the names of the constants. I have some legacy C++ code which requires some enums to be 1 or 2 In this article, we will discuss some of the efficient and easy ways to convert enum to string. If you use some source browsing tool (like cscope), you'll have to let it know about the external file. Easy way to use variables of enum types as string in C? https://img1.imgtp.com/2023/06/14/hn1P9Kz2.png bool in C - GeeksforGeeks In this situation, one can declare the enumerated type in which only male and female values are assigned. Historical installed base figures for early lines of personal computer? Solution to a problem should be as simple as possible. I am using enumerated type declaration. In the above example, we have set the values of all the days except Thursday and Friday. I recently started working with C++ so little bit confuse. This method overload is obsolete; use ToString(String). Oct 7, 2019 at 1:45pm Cambalinho (1444) see these enum: 1 2 3 4 5 6 7 8 9 10 enum TokenType { ID=0, KeyWord=1, Operator=2, Expression=3, String=4, Number=5, Char=6 }; when i do: cout<< TokenType::ID; it will print zero. We can manually specify the numbers in the initial enum like this: For this problem, I do a help function like this: Linear search is usually more efficient than std::map for small collections like this. The string variable is initialized with a const char* value from enum_str array inside the function. rev2023.7.14.43533. Jinku has worked in the robotics and automotive industries for over 8 years. I have a button that I want In the above code, we have used a defined function to convert enum to string and it works as follows. How to get an enum value from a string value in Java. In this example, we will manipulate some values of the enum variables to see the working of enums. enum flag { const1, const2, ., constN }; Here, name of the enumeration is flag. 10.4 Scoped enumerations (enum classes) - Learn C++ - LearnCpp.com Basically, you define all your enum values in a #define, then use them in the operator <<. This example shows how implicit values of enum elements can be utilized to access corresponding string values from an array. (Ep. If you're willing to drop the first, craft yourself a FOREACH() macro, then #define ERROR_VALUES() (ErrorA, ErrorB, ErrorC) and write your visitors in terms of FOREACH(). enum_strigs.push_back(getStringForEnum(i)); Use Custom Defined Function to Convert an Enum to a String in C++. For example, you could say: If someone added a TEST0 to the start of the enum, then the switch statement will still execute correctly, while your version would not. 0. Enums can have methods, fields, and constructors. ideone link for final iteration: http://ideone.com/hQTKQp. What does a potential PhD Supervisor / Professor expect when they ask you to read a certain paper? What is the purpose of a function prototype? Getting enum name from enum instance - Arduino Stack Exchange If any other value is assigned other than male or female then it is not appropriate. hello, Is there code or static lib for hook swapchain present? The inclusion of the Total element in the above enum type can have practical usage. If we do not explicitly assign values to enum names, the compiler by default assigns values starting from 0. Is it legal to not accept cash as a brick and mortar establishment in France? Easy way to use variables of enum types as string in C? In TypeScript, enum values are numbers. This option requires a way to map the integer value of the enum to a string. I recently got into a discussion with a co-worker about using enums across a Also using enum the way u have used is not correct . How to convert an enum type variable to a string in C++? Following is simpler, Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. The Overflow #186: Do large language models know what theyre talking about? What is the state of the art of splitting a binary file by size? Are Tucker's Kobolds scarier under 5e rules than in previous editions? What does a potential PhD Supervisor / Professor expect when they ask you to read a certain paper? See my edit to my answer. More info about Internet Explorer and Microsoft Edge. Join Bytes to post your question to a community of 472,559 software developers and data experts. You can change default values of enum elements during declaration (if necessary). Enumeration declaration - cppreference.com How terrifying is giving a conference talk? Find centralized, trusted content and collaborate around the technologies you use most. He is from an electrical/electronics engineering background but has expanded his interest to embedded electronics, embedded programming and front-/back-end programming. Connect and share knowledge within a single location that is structured and easy to search. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What should I do? Control two leds with only one PIC output, Passport "Issued in" vs. "Issuing Country" & "Issuing Authority". This (of course) implies that your enum really starts at 0 and is consecutive without "holes". And who? Please refer to the same example below for a better understanding. Syntax: enum enumerated-type-name { value1, value2, value3..valueN }; For Example: If a gender variable is created with the value male or female. Good job! Enum. Result value. What's the Hello, And what is your solution for this? UE_LOG (LogTemp, Log, TEXT ("MyEnum is %s"), *UEnum::GetValueAsString (MyEnum)); Note: Since %s doesn't accept a FString we have to prepend the *. thanks for the clear explanation ! Problems with enums across a dll interface? Print it as an integer. @Qix he is trying to print out the name of the, How to print out strings from the enum class in C++? To use do: #include <stdio.h> /* ~ The macro ~ */ #define macro_handler (T) \ T (ZERO) \ T (ONE) \ T (TWO) GENERATE_ENUM_STRING_NAMES (macro_handler, nuclearLaunchCodesData) GENERATE_ENUM_LIST (macro_handler, nuclearLaunchCodesData) #undef macro_handler int main () { printf ("%s\n", nuclearLaunchCodesData_Strings [ZERO]); } c enum macros For one thing, it represents the number of elements in the enumeration that can be utilized as a loop parameter, as shown in the following sample code. dll interface. Add a break at the end of each case to prevent this as good practice. Is there anything wrong I am doing? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. What is the problem with negative enum values? Enums cannot extend any class because they internally extend Enum class although they may implement many interfaces. For example, the following enumeration defines two members, Shade.Gray and Shade.Grey, that have the same underlying value. They are not needed: a macro invocation can span multiple lines. rev2023.7.14.43533. the use of Intellisence. It can also be used with switch statements. I would like it print TEST1 or TEST2 etc then print type, but he don't go in the right case .. If you know what you want to print at compile time, you can use the preprocessor like this: However, this is really no different than doing this: Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. C++ #include <iostream> using namespace std; enum roll_no { satya = 70, aakanskah = 73, sanket = 31, aniket = 05, avinash = 68, shreya = 47, nikita = 69, }; int main () { enum roll_no obj; obj = avinash; For more information about formatting in general, see Formatting Types. Distances of Fermat point from vertices of a triangle. In Indiana Jones and the Last Crusade (1989), when does this shot of Sean Connery happen? We shall create a function that takes an enum value as an argument, and we manually return the enum names as a string from that function. The following "trick" to print enums (in a more compact notation) is made possible because of the following two facts: C arrays are based on index 0. enums have a "builtin" integer value starting at 0. TypeScript enums also store a mapping from the numeric value back to the string, so to convert the numeric enum value back to a string do the following. enums are a particular size. Options for replacing enums stored in database. How to enumerate through Enums in a Class, The next Access Europe meeting is on Wed 7 June - Northwind 2.0 Developer Edition Inventory and String functions, Join our open community on Discord to learn programming, SEO, and marketing. I agree with @Luther Blissett on using switch statement (or a function pointer too). How to convert a class to another class type in C++? #. Why was there a second saw blade in the first grail challenge? The following example demonstrates converting an enumerated value to a string. i haven't tested it yet, but what Using Enumeration type Using define to declare boolean values 1. Below is an example showing how we can get the values. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. And how do I handle negative enum values? Connect and share knowledge within a single location that is structured and easy to search. This method overload is obsolete; use ToString(). Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Temporary policy: Generative AI (e.g., ChatGPT) is banned. Enum Classes in C++ and Their Advantage over Enum DataType Adding up only highest 7 numbers in a table, How to deploy AntDB Community Version on a virtual machine on VMware WorkstationP2, How to deploy AntDB Community Version on a virtual machine on VMware WorkstationP3, The next Access Europe meeting is on Wed 5 July - Interactive Gantt Chart Scheduler in Access. Can't update or install app with new Google Account. Enumeration elements may have a positional value ( like Banana has 0 in our example code ), or it can have an explicit value (declared as enum Fruit { Banana = 34, }). Specify only format; the provider parameter is obsolete. C++ String to Enum Conversion. is there anyway for print 'ID' instead zero? Yes, we can convert enum to float in the same way as we have converted enum to int. 1 Answer. http://www.cplusplus.com/doc/tutorial/other_data_types/, How terrifying is giving a conference talk? The correct answer to this has already been given: no, you can't give the name of an enum, only it's value. The enum_to_string function takes the enum name as an argument and converts it to a string by matching the enum number with the string number. your this line will initialize the values like this. Microsoft makes no warranties, express or implied, with respect to the information provided here. Finally, we are printing all the enums after they are converted to a string. Hi all) So in this case the value of Thursday will become one more than the value of Wednesday, and the value of Friday will become one more than the value of Thursday, so that is why the value of Friday is printed as 3. This might need some work to make it work for the less simple cases [1]: . If format is null or an empty string (""), the general format specifier ("G") is used. Convert an Enum to a String in C# - C# Corner For more information about the enumeration format strings and formatting enumeration values, see Enumeration Format Strings.