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C Program – Count number of 1 bits in an Integer

To Count the number of 1 bits contained within an unsigned integer

/* Count the number of 1 bits contained within an unsigned integer */
#include <stdio.h>
int main()
{
unsigned int num = 255; /* to find the number of 1 bits in this number */
unsigned int orgvalue = num;
int count;
for (count = 0; num != 0; count++)
num = num & (num - 1);
printf("The no. of bits in %d is %d\n", orgvalue, count);
/* getch(); */
}

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