REVERSE A NUMBER USING RECURSION IN C PROGRAM

#include<stdio.h>

int main(){

int num,rev;

printf("\nEnter a number :");

scanf("%d",&num);

rev=reverse(num);

printf("\nAfter reverse the no is :%d",rev);

return 0;

}

int sum=0,r;

reverse(int num){

if(num){

r=num%10;

sum=sum*10+r;

reverse(num/10);

}

else

return sum;

return sum;

}

FIND POWER OF A NUMBER USING RECURSION USING C PROGRAM

#include<stdio.h>

int main(){

  int pow,num;

  long int res;

  long int power(int,int);

  printf("\nEnter a number: ");

  scanf("%d",&num);

  printf("\nEnter power: ");

  scanf("%d",&pow);

  res=power(num,pow);

  printf("\n%d to the power %d is: %ld",num,pow,res);

  return 0;

}

  int i=1;

  long int sum=1;

  long int power(int num,int pow){

      if(i<=pow){

           sum=sum*num;

          power(num,pow-1);

      }

      else

      return sum;

}

FIND SUM OF DIGITS OF A NUMBER USING RECURSION USING C PROGRAM

#include<stdio.h>

int main(){

  int num,x;

  clrscr();

  printf("\nEnter a number: ");

  scanf("%d",&num);

  x=findsum(num);

  printf("Sum of the digits of %d is: %d",num,x);

  return 0;

}

int r,s;

int findsum(int n){

if(n){

         r=n%10;

         s=s+r;

         findsum(n/10);

     }

     else

       return s;

}