二分法猜数——C/C++

/*两个人A和B猜数,先输入一个n,A从1到n之间选一个数,B来猜这个数,
   A会告诉B该数是大了还是小了,B至少要多少次才能确定A选的那个数呢? 
*/
#include<stdio.h>

int main()
{
    int n,res,cot=0; 
    scanf("%d%d",&n,&res);
    int low = 1,high = n;
    while(low<high){
        int t = (low+high)/2;
        cot++;
        if(t<res){
            low = t+1;
        }else if(t>res){
            high = t-1;
        }else{
            break;
        }
    }
    printf("%d",cot);
    return 0;
}

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转载自www.cnblogs.com/daemon94011/p/10603131.html