Program Of Without Passing Parameter Without Return Value in C

#include<stdio.h>

#include<conio.h>
                              

                              void sum();     // Function Decalaration
 

main()
{
 

clrscr();
                                  

                                 sum();    // Function Calling
 

getch();
 

}
                              

                               void sum()   // Function Define
 

{
 

int a,b,c;
 

printf("Enter First NUmber=");
 

scanf("%d",&a);
 

printf("Enter Second NUmber=");
 

scanf("%d",&b);
 

c=a+b;
 

printf("\n Answer=%d",c);
 

}