Return Without Arguments In Function Of C language .

function type 3 :

 Return Without Arguments :

example :

write a function to sum two numbers :

 #include<stdio.h>

int sum();

void main()

{

        sum();

}

   int sum ()

    {

int a,b,c;

        printf("Enter two  number :");

        scanf("%d%d",&a,&b);

       printf("sum :%d",a+b);

       return(a+b);

    }