求int型数据在内存中存储时1的个数

5   

2 

 1 #include <stdio.h>
 2 
 3 int main()
 4 {
 5     int n, count;
 6     while (scanf("%d", &n) != EOF)
 7     {
 8         count = 0;
 9         while (n)
10         {
11             if (n & 1)
12             {
13                 count++;
14             }
15             n = n >> 1;
16         }
17         printf("%d\n", count);
18     }
19     return 0;
20 }

 1 #include <stdio.h>
 2 
 3 int main()
 4 {
 5     int n, count;
 6     while (scanf("%d", &n) != EOF)
 7     {
 8         count = 0;
 9         while (n)
10         {
11             count++;
12             n = n & (n - 1);
13         }
14         printf("%d\n", count);
15     }
16     return 0;
17 }