Reverse a number
#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 the size of int without using sizeof operator
#include<stdio.h>
int main(){
int *ptr = 0;
ptr++;
printf("Size of int data type: %d",ptr);
return 0;
}
