题解 | #奇偶校验#

#include <iostream>
using namespace std;

int* bin(int a){
    int num=7,cou=0;
    static int ans[8];;
    do{
        ans[num--]=a%2;
        if(a%2==1){
            cou++;
        }
        a/=2;
    }while(a!=0);
    ans[0]=(cou+1)%2;
    return ans;
}
int main() {
    char a;
    int b;
    while (cin >> a ) { // 注意 while 处理多个 case
        b=a;
        int *r=bin(b);
        for(int i=0;i<8;i++){
            cout << *(r+i)  ;
            *(r+i)=0;
        }
        cout<<"\n";
    }
}