Answer Posted / krishna kanth

#include<stdio.h>
main()
{
int setbit=1;
int number=16;//for example
int numBitSet=0;
clrscr();

while(setbit<=number)//important and optimized condition
{

if(number&setbit)
numBitSet++;

setbit=setbit<<1;
}
printf("%d",numBitSet);
getch();
}

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