#include <stdio.h>

#include <time.h>

#include <math.h>

#define C 60000;

struct Student

{

char name[20];

int num;

char banji[10];

int time;

int feiyong;

};

void menu()

{

printf("\t\t\t*******************\n");

printf("\t\t\t\t1、输入 ******** \n");

printf("\t\t\t\t2、查询 *********\n ");

printf("\t\t\t\t3、使用显示****** \n");

printf("\t\t\t\t4、退出 *********** \n ");

printf("\t\t\t*******************\n");

}

int main()

{

clock_t start,finish; double TheTimes;

struct Student stu[30] ; int i,j,d,e,f;char na[20];

printf("\t\t\t\t***** 欢迎进入机房收费管理系统 ****\n ") ;

while(1)

{

menu();

printf("\t请输入你的选择：");

scanf("%d",&i) ;

switch(i)

{

case 1: for(int i=0;i<30;i++)

{

printf("请输入学号：");

scanf("%d",&stu[i].num);

printf("\n 请输入班级：");

scanf("%s",stu[i].banji);

printf("\n请输入姓名：");

scanf("%s",stu[i].name);

printf("\n请输入上机时间：");

scanf("%d",&stu[i].time);

stu[i].feiyong=0;

}

start=clock()

;break;

case 2:

printf(" 1、按学号查询：");

printf("\n2、按姓名查询：\n");

scanf("%d",&e);

if(e==1)

{

printf(" 请输入要查询的学号：");

scanf("%d",&d);

for(j=0;j<30;j++)

{

if( stu[j].num==d)

{

finish=clock();

TheTimes=(double)(finish-start)/C;

printf("你上来%f分钟\n",TheTimes);

}

}

}

else if(e==2)

{

printf(" 请输入要查询的姓名：");

scanf("%s",na);

for(j=0;j<30;j++)

{

if( stu[j].name==na)

{

finish=clock();

TheTimes=(double)(finish-start)/C;

printf("你上来%f分钟\n",TheTimes);

}

}

}

; break;

case 3: for(j=0;j<30;j++)

{

finish=clock();

TheTimes=(double)(finish-start)/C;

stu[j].feiyong=(TheTimes/60)*1;

}

for(j=0;j<30;j++)

{

printf("学号：%d",&stu[j].num);

printf("\n 班级：%s",stu[j].banji);

printf("\n姓名：%s",stu[j].name);

printf("\n上机时间：%d",&stu[j].time);

printf("\n费用：%d",&stu[j].feiyong);

printf("\n请输入上机时间：%d",&stu[j].time);

printf("\n");

}

;break;

case 4:return 0;break;

}

}

return 0;

}