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kelvin-fly/10_num_of1.c

Created October 26, 2012 02:43
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get the sum of number's 1
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10_num_of1.c
#include <stdio.h>
#include <math.h>
int num_1( int value, int n_bits);
int main()
{
int a, b, c;
scanf("%o",&a);
scanf("%d",&b);
c = num_1( a, b );
printf("%d\n", c);
return 0;
}
int num_1(int value, int n_bits )
{
int parity = 0;
while(n_bits > 0)
{
parity += value & 1;
value >>= 1;
n_bits -=1;
}
return parity;
}
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