is not and never has been C++, nor has it even been C. See the ISO C++ standard 3.6.1 or the ISO C standard 184.108.40.206.1. A conforming implementation accepts
A conforming implementation may provide more versions of main(), but they must all have return type int. The int returned by main() is a way for a program to return a value to “the system” that invokes it. On systems that doesn’t provide such a facility the return value is ignored, but that doesn’t make “void main()” legal C++ or legal C. Even if your compiler accepts “void main()” avoid it, or risk being considered ignorant by C and C++ programmers.
In C++, main() need not contain an explicit return statement. In that case, the value returned is 0, meaning successful execution. For example:
Note also that neither ISO C++ nor C99 allows you to leave the type out of a declaration. That is, in contrast to C89 and ARM C++ ,”int” is not assumed where a type is missing in a declaration. Consequently:
is an error because the return type of main() is missing.
To summarize above, it is never a good idea to use “void main()” or just “main()” as it doesn’t confirm standards. It may be allowed by some compilers though.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above
- Write a URL in a C++ program
- Write a C program that won't compile in C++
- Write your own memcpy() and memmove()
- How to write your own header file in C?
- When should we write our own copy constructor?
- When should we write our own assignment operator in C++?
- Write a program that produces different results in C and C++
- C program to write an image in PGM format
- Read/Write structure to a file in C
- How to write a running C code without main()?
- Write a C macro PRINT(x) which prints x
- Read/Write Class Objects from/to File in C++
- Does C++ compiler create default constructor when we write our own?
- Write one line functions for strcat() and strcmp()
- fopen() for an existing file in write mode