C语言问题怎么以-1结束

Question

从键盘上输入某小组同学考试成绩（正整数），求其中最高成绩和最低成绩。输入的成绩以-1结束

Answer 1

#include "stdio.h"
int main(){
    int max,min,n,flag = 1;
    while(1){
        scanf("%d",&n);
        if(n == -1) break;
        if(flag){
            max = n;
            min = n;
            flag = 0;
        }
        if(n > max){
            max = n;
        }
        if(n < min){
            min = n;
        }
    }
    printf("max = %d min = %d",max,min);
    return 0;
}