#include <stdio.h> int func(int x) { int countx = 0; while(x) { countx ++; x = x & (x - 1); } return countx; } int main() { int x; int cnt=0; scanf("%d",&x); cnt= func(x); printf("%d\n",cnt); }
嘻嘻刷题的时候遇见的代码没想到这里运用上了,学以致用嗷~
int func(int x) {
int countx = 0;
while(x) {
countx ++;
x = x & (x - 1); //求转换为二进制后,1的个数,其实还有一个是x=x|(x-1);找的是0 的个数~
}
return countx;
}