二分答案猜数字

#include <cstdio>
#include <iostream>
using namespace std;
int main(void){
    int input = 0;
    int beginNum = 1;
    int endNum = 100;
    int mid = 0 ;
    int counter = 0;//一共猜了多少次
    printf("请输入一个数字：");
    scanf("%d",&input);
    printf("%d",input);
    mid = (beginNum + endNum) / 2; //中间数
    do{
        printf("人机猜的数字:%d\n",mid);
        if(mid>input){
        printf("大了\n");    
            counter++;
            endNum = mid;
        }
        if(mid<input){
            printf("小了\n");
            beginNum = mid;
            counter++;
        }
        if(mid==input){
            printf("猜中了\n");
            counter++;
            break;
        }
        mid = (beginNum + endNum) / 2; //中间数
    }while(input != mid);
    printf("人机猜的数字:%d\n",mid);
    printf("人机一共猜了%d次\n",counter);
    
    return 0;
}