#include<stdio.h>
#include<string.h>
#include<iostream>
#include <math.h>
#include<time.h>
#define CRT_SECURE_NO_WARNINGS
#pragma warning(disable:4996)
using namespace std;
int randomnumber()//获取随机数
{
    srand((unsigned)time(NULL));
    return rand() % 100 + 1;
}
int compare(int a, int b)
{
    return (a > b) ? 2 : (b > a) ? 1 : 0;//1大了，2小了，0猜对了
}

int main()
{
    int a, b, c, i = 1;
    a = randomnumber();
    cout << a << endl;
    puts("数字范围1-100，你有十次机会，输入你的数字吧");
    for (i=0;i<11;i++)
    {
        int temp=100,num=0;
        scanf_s("%d", &b);
        c = compare(a, b);
        switch (c)
        {
        case 1:printf("在%d到%d之间",num,b); break;
        case 2:printf("在%d到%d之间", b, temp); break;
        case 0:puts("you are right"); goto end;
        }
        puts("再试试吧");
        temp = b; num = b;
    }
end:
    switch (i)
    {
    case 1:puts("天才"); break;
    case 2: case 3:puts("聪明"); break;
    case 4: case 5:puts("一个凡人"); break;
    case 6: puts("智商着急"); break;
    case 7: case 8:puts("笨"); break;
    case 9: case 10:puts("笨到家"); break;
    case 11:puts("我对你无语"); break;
    }
    return 0;
}

问题好像就出在循环里，temp，和num的值为什么被重置了

问题解决的话，请点下采纳

#include<stdio.h>
#include<string.h>
#include<iostream>
#include <math.h>
#include<time.h>
#define CRT_SECURE_NO_WARNINGS
#pragma warning(disable:4996)
using namespace std;
int randomnumber()//获取随机数
{
    srand((unsigned)time(NULL));
    return rand() % 100 + 1;
}
int compare(int a, int b)
{
    return (a > b) ? 2 : (b > a) ? 1 : 0;//1大了，2小了，0猜对了
}

int main()
{
    int a, b, c, i = 1;
    a = randomnumber();
    cout << a << endl;
    puts("数字范围1-100，你有十次机会，输入你的数字吧");
    int temp=100,num=0;
    for (i=0;i<11;i++)
    {
        scanf_s("%d", &b);
        c = compare(a, b);
        switch (c)
        {
        case 1:printf("在%d到%d之间",num,b); break;
        case 2:printf("在%d到%d之间", b, temp); break;
        case 0:puts("you are right"); goto end;
        }
        puts("再试试吧");
        if (c == 1) temp = b; 
        if (c == 2) num = b;
    }
end:
    switch (i)
    {
    case 1:puts("天才"); break;
    case 2: case 3:puts("聪明"); break;
    case 4: case 5:puts("一个凡人"); break;
    case 6: puts("智商着急"); break;
    case 7: case 8:puts("笨"); break;
    case 9: case 10:puts("笨到家"); break;
    case 11:puts("我对你无语"); break;
    }
    return 0;
}