Give a very good method to count the number of ones in a 32
bit number.
(caution: looping through testing each bit is not a solution)

Answer Posted / vijay

#include<stdio.h>
main()
{
int x=123,i=0;
while(x)
{
x=x&(x-1);
i++;
}
printf("Number of set bits are %d \n",i);
}

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