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 126.96.36.199.1. 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()
- When should we write our own assignment operator in C++?
- How to write your own header file in C?
- When should we write our own copy constructor?
- How to write a running C code without main()?
- C program to write an image in PGM format
- Read/Write structure to a file in C
- Write a C macro PRINT(x) which prints x
- Write a program that produces different results in C and C++
- Write your own strlen() for a long string padded with '\0's
- How to write long strings in Multi-lines C/C++?
- fopen() for an existing file in write mode
- Write a C program that does not terminate when Ctrl+C is pressed