What will be the output of the program?

#include<stdio.h>
int

What will be the output of the program?

#include<stdio.h>
int reverse(int);
int main()
{
     int no=5;
     reverse(no);
     return 0;
 }
int reverse(int no)
 {
     if(no == 0)
         return 0;
     else
         printf("%d,", no);
     reverse (no--);
 }

2) Point out the error in the program

#include<stdio.h>
int f(int a)
 {
   a > 20? return(10): return(20);
 }
int main()
 {
     int f(int);
     int b;
     b = f(20);
     printf("%d\n", b);
     return 0;
 }

3) What will be the output of the program?

#include<stdio.h>
int main()
 {
     int i=1;
     if(!i)
         printf("Study2Online,");
     else
     {
         i=0;
         printf("C-Program");
         main();
     }
     return 0;
 }

4) What will be the output of the program?

#include<stdio.h>
int addmult(int ii, int jj)
 {
     int kk, ll;
     kk = ii + jj;
     ll = ii * jj;
     return (kk, ll);
 }
int main()
 {
     int i=3, j=4, k, l;
     k = addmult(i, j);
     l = addmult(i, j);
     printf("%d, %d\n", k, l);
     return 0;
 }

5) What will be the output of the program?

#include<stdio.h>
void fun(int);
typedef int (*pf) (int, int);
int proc(pf, int, int);
int main()
 {
     int a=3;
     fun(a);
     return 0;
 }
void fun(int n)
 {
     if(n > 0)
     {
         fun(--n);
         printf("%d,", n);
         fun(--n);
     }
 }