how can we have two main function

[divakarpandiyan]

Dear All,
As all know C does not support Polymorphism concept. And we can't declare two function with same name then how we can have two main function
for ex
main ();
or

main (argv,argc[])
then how it is possible. Even printf is also work in the same concept. Printf is a function which can take multiple parameter and that too different parameter

Can you help me in this....

[gpraghuram]

Dear All,
As all know C does not support Polymorphism concept. And we can't declare two function with same name then how we can have two main function
for ex
main ();
or

main (argv,argc[])
then how it is possible. Even printf is also work in the same concept. Printf is a function which can take multiple parameter and that too different parameter

Can you help me in this....

printf declartion is
int printf(char *args,...);
So you can pass anything in the args string.
This is not overloading.
printf is use of variable argument list.
You can go for 2 mains if you can put the main in #ifdef and supply the variable using -D while compiling the code

Raghuram

[weaknessforcats]

As all know C does not support Polymorphism concept.

It does if you use function pointers in your structs. It's just that C++ makes it easy whereas in C you have to do a lot more work. B ut I have seen polymorphic C programs in operation.

Setting up a VTBL is just not that hard.