WAP in C to count trailing zeros using bitwise operator?

Answer 1

Try this program :

#include<bits/stdc++.h>
using namespace std;
void PrintBinaryOfNumber_techQH(int num)
{
   int mask = 0x4000;
   if ((num & 0x8000) == 0)
      printf("0");
   else
      printf("1");
   while (mask != 0) {
      if ((num & mask) == 0)
         printf("0");
      else
         printf("1");
      mask = mask >> 1;
   }
}
int main()
{
   int i, count = 0;
   unsigned int num;
   printf("\nEnter the number:");
   scanf("%d", &num);
   printf("\nDecimal number in binary format :");
   PrintBinaryOfNumber_techQH(num);
   while (num != 0) {
      if (num & 1 == 1) {
         break;
      } 
else 
     {
         count++;
         num = num >> 1;
      }
   }
   printf("\nTrailing Zeros : %d", count);
return 0;
}