Lab7Ex6

#include <stdio.h>

int main(void){
  int x;
  int y;
  int sum;
  printf("x?");
  scanf("%d", &x);
  if (x == 1){
    printf("Happy Number! :)");
  }
  else if (x==4){
    printf("Unhappy Number! :(");
  }
  else {
    while (sum !=1 && sum !=4){
      sum = 0;
      while (x>0){
        y=x%10;
        sum+=(y*y);
        x/=10;
      }
      x = sum;
        printf("=>%d\n", x);
    }
  }
  if (sum == 1){
    printf("Happy Number! :)");
  }
  else if (sum == 4){
    printf("Unhappy Number! :(");
  }
   return 0;
}