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#include"stdio.h"
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#include"stdlib.h"
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#include"string.h"
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#include"windows.h"
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#define number 100 //最大学生人数
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#define id_len 20 //学号长度
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#define name_len 30 //姓名长度
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#define price 1.00 //每分钟单价
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int count;
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struct datacase
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{
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char id[id_len];
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char name[30+1];
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int time;
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}stu[number];
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int fun(char ch[id_len>name_len?id_len:name_len],int a);
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int add();
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int rep();
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void calculation(int kc);
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int fun(char ch[id_len>name_len?id_len:name_len],int a)
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//查找所需要的记录存储在第几个结构体中 a=1按学号查找；a=2按姓名查找
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{
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int k=-1;
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int i;
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for(i=0;i<count;i++)
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{
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if(1==a)
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{
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if(0==strcmp(stu[i].id,ch))
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{
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k=i;
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break;
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}
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}
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if(2==a)
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{
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if(0==strcmp(stu[i].name,ch))
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{
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k=i;
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break;
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}
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}
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}
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return k;
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}
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int add()
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{
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int f=0;//添加的学号已存在，f将被赋值为1
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char select[4];
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while(true)
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{
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if(count>number)
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{
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printf("系统已达存储上限，不可再添加\n");
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system("pause");
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return 0;
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}
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printf("请输入想要增加的学生信息:\n");
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printf("学号:");
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scanf("%s",stu[count].id);
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for(int i=0;i<count;i++)
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{
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if(0==strcmp(stu[i].id,stu[count].id))
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{
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printf("该学号已存在！\n对应的学生信息为：姓名:%s 上机时间：%d\n",stu[i].name,stu[i].time);
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system("pause");
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system("cls");
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f=1;
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break;
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}
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}
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if(f==1)
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{
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f=0;
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continue;
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}
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else
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{
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printf("姓名：");
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scanf("%s",stu[count].name);
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calculation(count);
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count++;
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}
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printf("是否继续添加学生信息？继续请回答yes\n");//除yes外所有字符都会导致退出
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scanf("%s",select);
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if(0!=strcmp(select,"yes"))
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{
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return 0;
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}
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else
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system("cls");
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}
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}
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int rep()
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{
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int selec;
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char select[4];
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char id_r[id_len];
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char name_r[name_len];
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int k,x;
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while(true)
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{
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printf(" 选择您希望进行的操作\n");
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printf(" 1、修改学生学号。\n");
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printf(" 2、修改学生姓名。\n");
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printf(" 3、修改学生上机时长\n");
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printf(" 4、退出修改\n");
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scanf("%d",&selec);
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system("cls");
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switch(selec)
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{
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case 1://修改学号
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printf("请输入需要修改的学生学号：");
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scanf("%s",id_r);
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k=fun(id_r,1);
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if(k!=-1)
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{
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printf("您希望将他的学号修改为:");
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scanf("%s",id_r);
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if(fun(id_r,1)==-1)
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{
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printf("确认要将%s同学的学号修改为%s吗？\n输入no可撤销操作\n",stu[k].name,id_r);
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scanf("%s",select);
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if(strcmp(select,"no"))
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{
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system("cls");
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strcpy(stu[k].id,id_r);
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printf("修改成功！");
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}
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else
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break;
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}
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else
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{
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printf("该学号已存在！");
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continue;
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}
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}
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else
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{
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system("cls");
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printf("未找到该条记录！请检查输入的学号是否正确%s\n",id_r);
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continue;
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}
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break;
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case 2://修改姓名
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printf("请输入需要修改的学生姓名：");
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scanf("%s",name_r);
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k=fun(name_r,2);
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if(k!=-1)
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{
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printf("您希望将他的姓名修改为:");
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scanf("%s",name_r);
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printf("确认要将%s同学的姓名修改为%s吗？\n输入no可撤销操作",stu[k].name,name_r);
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scanf("%s",select);
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if(strcmp(select,"no"))
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{
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strcpy(stu[k].name,name_r);
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printf("修改成功！\n");
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system("pause");
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}
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else
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continue;
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}
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else
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{
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system("cls");
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printf("未找到该条记录！请检查输入的姓名是否正确%s\n",name_r);
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continue;
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}
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break;
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case 3:
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printf("您希望以什么方式查看这名学生的记录?\n1、学号\n2、姓名\n");
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scanf("%d",&x);
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if(x==1)
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{
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printf("请输入该名学生的学号：");
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scanf("%s",id_r);
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k=fun(id_r,x);
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if(k==-1)
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{
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system("cls");
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printf("未找到该条学生信息\n");
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continue;
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}
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else
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calculation(k);
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}
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if(x==2)
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{
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printf("请输入该名学生的姓名：");
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scanf("%s",name_r);
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k=fun(name_r,x);
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if(k==-1)
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{
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printf("未找到该条学生信息");
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system("pause");
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system("cls");
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continue;
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}
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else
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calculation(k);
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}
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break;
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case 4: return 0;
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default:return -1;
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}
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system("cls");
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}
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return 0;
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}
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void calculation(int kc)//计算上机时间
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{
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int ti[4];
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printf("请按时：分的格式输入\n");
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printf("请输入该生上机时间：");
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scanf("%d:%d",&ti[0],&ti[1]);
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printf("请输入该生的下机时间");
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scanf("%d:%d",&ti[2],&ti[3]);
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if(ti[0]>=0&&ti[1]>=0&&ti[2]>=0&&ti[3]>=0&&ti[0]<24&&ti[1]<60&&ti[2]<24&&ti[3]<60)//输入合法性检查
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{
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stu[kc].time=(ti[2]-ti[0])*60+ti[3]-ti[1];
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system("cls");
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printf("本次上机时间为：%d分钟\n",stu[kc].time);
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system("pause");
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}
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else
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{
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printf("非法输入！请检查后重试\n");
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printf("老子不干了!");
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system("pause");
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calculation(kc);
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}
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}
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