Write a C program to run without main() function

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How to make a program in C and C++ without any main() function

 Here is an example of C and C++ program which run without main() function .

#define  main  my // macro declaration

void  my()
    printf("Hello C Language");

The above code runs because we defined main as my and at the time of compilation "my" is interchanged to "main". 

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