FUNCTION

#include<stdio.h>

//1st type
void minus (void);//1 step
void add (void);
void main(void)
{
    //int a,b, total;
    //a=10;
   // b=20;
    minus ();//call
    printf("hello\n");
add ();
printf("hello\n");
    //printf("total sum of A+B is: %d\n",total);
}
void minus(void)
{
int a,b,total;
a=10;
b=20;
total = b-a;
printf("total sum of b-a is: %d\n",total);
}
void add (void)
{
int a,b,total;
a=10;
b=20;
total = a+b;
printf("total sum of a+b is: %d\n",total);
}