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Sep 19, 2019 · In C/C++ the default return type of the main function is int, i.e. main() will return an integer value by default. The return value of the main tells the status of the execution of the program. The main() function returns 0 after the successful execution of the program otherwise it returns a non-zero value.
If the return type of the main function is a type compatible with int, a return from the initial call to the main function is equivalent to calling the exit function with the value returned by the main function as its argument; 11) reaching the } that terminates the main function returns a value of 0.
Jun 22, 2023 · In C/C++ the default return type of the main function is int, i.e. main() will return an integer value by default. The return value of the main tells the status of the execution of the program. The main() function returns 0 after the successful execution of the program otherwise it returns a non-zero value.
Oct 15, 2008 · main() should be declared as either: int main(void) int main(int argc, char **argv) Or equivalent. For example, int main(int argc, char *argv[]) is equivalent to the second one. In C90, the int return type can be omitted as it is a default, but in C99 and newer, the int return type may not be omitted.
Jan 22, 2015 · As the compiler is telling you, main() must return int. int main(void) { return 0; } the return value being the exit code of the program.
Jul 13, 2023 · A common implementation-defined form of main is int main (int argc, char * argv [], char * envp []), where a third argument, of type char **, pointing at an array of pointers to the execution environment variables, is added. Return value
May 28, 2024 · In the example above, function getValueFromUser has a return type of void (meaning no value will be returned to the caller), and function main has a return type of int (meaning a value of type int will be returned to the caller).
Returning from main ¶. Now that we have functions that return values, I can let you in on a secret. main is not really supposed to be a void function. It’s supposed to return an integer: int main () { return 0; }
Oct 12, 2020 · The datatype you defined with main determines the return type of main. Integer is the default data type (int). It always returns a value of type Interger. If you use "void main()," you're indicating that there isn't a return type.
Jun 6, 2024 · 4) The return type of the main function cannot be deduced (auto main {...} is not allowed).
