帮忙看看这个程序呗，总感觉还有其他方法表达

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int i;
    printf("*******************************************************\n");
    printf("*                    1.录入学生成绩                   *\n");
    printf("*                    2.查询学生成绩                   *\n");
    printf("*                    3.退出                           *\n");
    printf("*******************************************************\n");
    do//判断所选选项是否为退出
    {
        printf("请选择:\n");
        scanf("%d",&i);
        while(i!=1 && i!=2 && i!=3)
        {
            printf("您的选择有误，请重新选择：\n");
            scanf("%d",&i);
        }
            if(i==1)
            {
                system("cls");
                printf("开始查找\n");
                system("pause");
            }
            else if(i==2)
            {
                system("cls");
                printf("开始排序\n");
                system("pause");
            }
    }while(i!=3);
    if(i==3)
    {
        system("cls");
        printf("已退出\n");
    }

    return 0;
}