Function declaration and prototype in C
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Function Declaration and Function Prototypes
C always needs declaration before use. This is also true for functions. For functions the declaration needs to be before the first call of the function. A full declaration includes the return type and the number and type of the arguments. This is also called the function prototype.
For Example :
int
add(
int,
int);
This statement declares a function called add, it has two integer arguments and returns an integer.
Main Function In C
A main function is placed where the execution of the starts. main() cannot return anything.
Can I run a program in c without main if yes how? Answer is "NO".
The reason is, main() is a function called by another function, which is the start-routine. This routine is created by the compiler and will be same for all the programs that you write.
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