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#include<stdio.h>
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#include<string.h>
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#include<stdlib.h >
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struct
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{
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char id[20];
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char name[20];
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char _class[5];
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char online[1];
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float _fee;
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float begin_hour;
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float begin_min;
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float end_hour;
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float end_min;
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}student[15];
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void dengji();
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void shangji();
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void fee();
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void xiugai();
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void chaxun();
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int i,k,m;
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int main(void)
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{
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int select;
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do
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{
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printf("*****************欢迎进入机房收费管理系统*****************\n");
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printf(" 1.学生登记\n");
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printf(" 2.学生上机时间\n");
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printf(" 3.学生下机时间及费用\n");
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printf(" 4.修改学生信息\n");
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printf(" 5.查询学生信息\n");
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printf(" 6.退出系统\n");
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printf("*****************欢迎进入机房收费管理系统*****************\n");
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printf(" 请输入选项:");
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scanf("%d",&select);
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switch(select)
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{
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case 1: getchar();
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dengji();
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break;
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case 2: getchar();
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shangji();
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break;
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case 3:getchar();
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fee();
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break;
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case 4:getchar();
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xiugai();
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break;
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case 5:getchar();
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chaxun();
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break;
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case 6: break;
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default:break;
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}
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system("cls");
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}while(select!=6);
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return 0;
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}
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void dengji() //学生信息//
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{
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static int j=0;
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system("cls");
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printf("****************学生信息登记****************\n");
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for(i=j;i<15;i++)
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{
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char c;
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printf("班级:");
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gets(student[i]._class);
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printf("学号:");
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gets(student[i].id);
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printf("姓名:");
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gets(student[i].name);
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printf("是否继续输入？(输入Y或N)");
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scanf("%c",&c);
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if(c=='N'||c=='n')
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{
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j=i+1;
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break;
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}
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getchar();
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printf("\n");
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}
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}
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void shangji() //上机//
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{
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char _id[20];
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system("cls");
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printf("****************上机时间登记****************\n");
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printf("请输入上机学生的学号:");
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gets(_id);
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for(i=0;i<15;i++)
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{
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if(strcmp(_id,student[i].id)==0)
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{
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printf("上机时间:");
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scanf("%f:%f",&student[i].begin_hour,&student[i].begin_min);
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printf("输入任意键返回上一级........\n");
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system("pause");
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break;
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}
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}
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if(i==14)
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{
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printf(" 该生信息未录入!\n");
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printf(" 输入任意键返回上一级........\n");
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system("pause");
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}
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}
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void fee() //下机//
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{
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char _id[20];
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system("cls");
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printf("****************下机时间及费用登记****************\n");
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printf("本机房每小时5元\n");
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printf("输入下机学生学号:");
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gets(_id);
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for(i=0;i<15;i++)
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{
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if(strcmp(_id,student[i].id)==0)
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{
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if(!(student[i].begin_hour&&student[i].begin_min))
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{
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printf("该生未上机!\n");
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system("pause");
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break;
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}
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printf("下机时间:");
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scanf("%f:%f",&student[i].end_hour,&student[i].end_min);
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student[i]._fee=(student[i].end_hour+student[i].end_min/60-student[i].begin_hour-student[i].end_min/60)*5;
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printf("该生上网费用为:%.1f\n",student[i]._fee);
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printf("输入任意键返回上一级........\n");
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system("pause");
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break;
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}
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}
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if(i==14)
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{
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printf(" 该生信息未录入!\n");
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printf(" 输入任意键返回上一级........\n");
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system("pause");
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}
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}
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void chaxun() //查询//
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{
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system("cls");
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printf("*************************************学生信息查询*************************************\n");
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printf("班级\t\t");
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printf("学号\t\t");
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printf("姓名\t\t");
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printf("上机时间\t");
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printf("下机时间\t");
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printf("上机费用\t");
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printf("在线状态\n");
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for(i=0;i<15;i++)
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{
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printf("%s\t\t",student[i]._class);
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printf("%s\t\t",student[i].id);
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printf("%s\t\t",student[i].name);
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printf("%g:%g\t\t",student[i].begin_hour,student[i].begin_min);
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printf("%g:%g\t\t",student[i].end_hour,student[i].end_min);
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printf("%.1f\t\t",student[i]._fee);
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if(student[i].begin_hour==0)
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printf("未上机");
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else if(student[i].begin_hour!=0&&student[i].end_hour==0)
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printf("在线");
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else if(student[i].begin_hour!=0&&student[i].end_hour!=0)
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printf("离线");
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printf("\n");
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}
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printf("*************************************学生信息查询*************************************\n");
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printf("\n\n输入任意键返回上一级！");
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getchar();
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}
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void xiugai() //修改//
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{
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char _id[20],name[20],banji[5];
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int eh,em,n,bh,bm;
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system("cls");
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printf("****************修改学生信息****************\n");
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printf("请输入要修改学生的学号：\n");
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gets(_id);
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for(i=0;i<15;i++)
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{
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if(strcmp(_id,student[i].id)==0)
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{
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printf("请选择要修改的内容：1：姓名 2：班级 3：上机时间 4：下机时间\n");
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scanf("%d",&n);
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switch(n)
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{
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case 1:
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printf("请输入新的姓名:\n");
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getchar();
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gets(name);
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strcpy(student[i].name,name);
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system("pause");
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break;
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case 2:
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printf("请输入新的班级:\n");
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getchar();
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gets(banji);
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strcpy(student[i]._class,banji);
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system("pause");
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break;
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case 3:
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printf("请输入新的上机时间:\n");
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getchar();
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scanf("%d:%d",&bh,&bm);
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student[i].begin_hour=bh;student[i].begin_min=bm;
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system("pause");
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break;
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case 4:
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printf("请输入新的下机时间:\n");
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getchar();
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scanf("%d:%d",&eh,&em);
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student[i].end_hour=eh;
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student[i].end_min=em;
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student[i]._fee=(student[i].end_hour+student[i].end_min/60-student[i].begin_hour-student[i].end_min/60)*5;
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system("pause");
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break;
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}
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}
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}
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}
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