Return type of main() function in c programming language

Return type of main() function in c programming language

Question: Will the following code compile? If yes, then is there any other problem with this code?

#include

void main(void)
{
    char *ptr = (char*)malloc(10);

    if(NULL == ptr)
    {
        printf("\n Malloc failed \n");
        return;
    }
    else
    {
        // Do some processing

        free(ptr);
    }

    return;
}

Answer: The code will compile error free but with a warning (by most compilers) regarding the return type of main()function. Return type of main() should be ‘int’ rather than ‘void’. This is because the ‘int’ return type lets the program to return a status value. This becomes important especially when the program is being run as a part of a script which relies on the success of the program execution.

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