#include<stdlib.h>
#include<stdio.h>
void main()
{
    int magic;
    int guess;
    int counter;
    guess=magic-1;
    counter=0;
    while(magic!=guess)
    {
        printf("guess the magic number:");
        scanf("%d",&guess);
        counter++;
        if(guess>magic)
            printf("wrong to high\n");
        else if(guess<magic)
            printf("wrong to low\n");
    }
    printf("right\n");
    printf("guess is %d\n",counter);
}

漏了magic=rand();找到错了