What will be the output of the program?

#include<stdio.h>
int

What will be the output of the program?

#include<stdio.h>
int sumdig(int);
int main()
{
     int a, b;
     a = sumdig(123);
     b = sumdig(123);
     printf("%d, %d\n", a, b);
     return 0;
 }
int sumdig(int n)
 {
     int s, d;
     if(n!=0)
     {
         d = n%10;
         n = n/10;
         s = d+sumdig(n);
     }
     else
         return 0;
     return s;
 }

2) What will be the output of the program?

#include<stdio.h>
int fun(int);
int main()
 {
     float k=3;
     fun(k=fun(fun(k)));
     printf("%f\n", k);
     return 0;
 }
int fun(int i)
 {
     i++;
     return i;
 }

3) What will be the output of the program?

#include<stdio.h>
int sumdig(int);
int main()
{
     int a, b;
     a = sumdig(123);
     b = sumdig(123);
     printf("%d, %d\n", a, b);
     return 0;
 }
int sumdig(int n)
 {
     int s, d;
     if(n!=0)
     {
         d = n%10;
         n = n/10;
         s = d+sumdig(n);
     }
     else
         return 0;
     return s;
 }

4) What will be the output of the program?

#include<stdio.h>
int fun(int i)
 {
     i++;
     return i;
 }
int main()
 {
     int fun(int);
     int i=3;
     fun(i=fun(fun(i)));
     printf("%d\n", i);
     return 0;
 }

5) What will be the output of the program?

#include<stdio.h>
int fun(int(*)());
int main()
 {
     fun(main);
     printf("Hi\n");
     return 0;
 }
int fun(int (*p)())
 {
     printf("Hello ");
     return 0;
 }