模拟上机

C++版
#include <iostream>
#include <string>
#include <windows.h>

using namespace std;
int i;
float price = 1;//上机单价
int n;          //学生总数

class Student{
public:
    void setInfo(){
        cout << "请输入姓名:";
        cin >> name;

        cout << "请输入学号:";
        cin >> id;

        cout << "请输入专业:";
        cin >> major;

        cout << "请输入班极:";
        cin >> grade;
    }

    void setBenigTime(){
        cout << "请输入上机时长(xx:xx):";
        cin >> Time;
    }

    float getMoney(){
        return t*price;
    }

    void clacTime(){
        unsigned int loc = Time.find(":", 0);
        if (loc == string::npos){
            cout << "出现异常错误!" << endl;
            exit(0);
        }
        float hour = atof(Time.substr(0, loc).c_str());
        int min = atoi(Time.substr(loc+1).c_str());

        if (0 < min && min < 30){
            hour += 0.5;
        }else if (30 <= min && min <60){
            hour += 1;
        }
        t = hour;
    }
    void showInfo(){
        cout << name << " " << id << " " << getMoney()<<"元" << endl;
    }

    void showAllInfo(){
        cout << "姓名:" << name << endl;
        cout << "学号:" << id << endl;
        cout << "专业:" << major << endl;
        cout << "年级:" << grade << endl;
        cout << "上机时长:" << Time << endl;
        cout << "所需费用:" << getMoney() << endl;;
    }

    bool isSameMajor(string str){
        return str.compare(major) == 0;
    }

    bool isSameid(string str){
        return str.compare(id) == 0;
    }

    bool isSameName(string str){
        return str.compare(name) == 0;
    }

private:
    string name;        // 姓名
    string id;          // 学号
    string major;       // 专业
    string grade;       // 班级
    string Time;        // 上机时间
    float t;            // 上机总时间
};

Student* p = NULL; // 学生数据地址


int showInfo(){
    int m;
    cout << "1.修改上机每小时价格."<< endl;
    cout << "2.输入n名上机学生." << endl;
    cout << "3.计算各学生上机费用." << endl;
    cout << "4.查询学生上机情况." << endl;
    cout << "5.机器使用情况." << endl;
    cout << "6:退出." << endl;
    cout << "请输入序号:";
    cin >> m;
    return m;

}

void menu4(){
    int n;
    cout << "1.查找条件为班级" << endl;
    cout << "2.查找条件为学号" << endl;
    cout << "3.查找条件为姓名" << endl;
    cout << "请输入序号：";
    cin >> n;
    switch (n)
    {
    default:
        break;
    }
    string str;
    cout << "请输入可找条件：";
    cin >> str;

    switch (n)
    {
    case 1:
        for (i = 0; i < n; i++){
            if (p[i].isSameMajor(str)){
                p[i].showInfo();
            }
        }
        break;
    case 2:
        for (i = 0; i < n; i++){
            if (p[i].isSameid(str)){
                p[i].showInfo();
            }
        }
        break;
    case 3:
        for (i = 0; i < n; i++){
            if (p[i].isSameName(str)){
                p[i].showInfo();
            }
        }
        break;
    default:
        break;
    }
}
int main(){
    bool flag = true;
    while (flag){
        system("cls");
        int m = showInfo();
        switch (m)
        {
        case 1:
            cout << "请输入上机单价:";
            cin >> price;
            break;
        case 2:
            cout << "请输入学生总数:";
            cin >> n;

            p = new Student[n];
            for (i = 0; i < n; i++){
                p[i].setInfo();
                p[i].setBenigTime();
                p[i].clacTime();
                cout << endl;
            }
            break;
        case 3:
            for (i = 0; i < n; i++)
                p[i].showInfo();
            system("pause");
            break;
        case 4:
            menu4();
            system("pause");
            break;
        case 5:
            for (i = 0; i < n; i++)
                p[i].showAllInfo();
            system("pause");
            break;
        case 6:
            flag = false;
            break;

        }
    }
    delete[] p;
    return 0;
}

C语言版

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

float price = 1;//上机单价
int n;          //学生总数

typedef struct  Student_def
{
    char name[512];     // 姓名
    char id[512];       // 学号
    char major[512];    // 专业
    char grade[512];    // 班级
    char Time[512];     // 上机时间
    float t;            // 上机总时间
}Student;

void setInfo(Student* p){
    printf("请输入姓名:");
    scanf("%s", p->name);

    printf("请输入学号:");
    scanf("%s", p->id);

    printf("请输入专业:");
    scanf("%s", p->major);

    printf("请输入班极:");
    scanf("%s", p->grade);

    printf("请输入上机时长(xx:xx):");
    scanf("%s", p->Time);
}

float getMoney(Student stu){
        return stu.t*price;
}

void clacTime(Student* stu){
    int i, j;
    char temp[512] = {0};
    float hour;
    int min;
    for (i = 0; i < strlen(stu->Time); i++){
        if (stu->Time[i] == ':'){
            break;
        }
    }
    strncpy(temp, stu->Time, i);
    hour = atof(temp);

    for (j = i+1; j < strlen(stu->Time); j++){
        temp[j - i-1] = stu->Time[j];
    }
    temp[j - i - 1] = 0;
    min = atoi(temp);

    if (0 < min && min < 30){
            hour += 0.5;
    }else if (30 <= min && min <60){
            hour += 1;
        }
        stu->t = hour;
}

void showInfoOfStudent(Student stu){
    printf("%s  %s %.2f元\n", stu.name, stu.id, getMoney(stu));
}

void showAllInfo(Student stu){
        printf("姓名:%s\n",stu.name );
        printf("学号:%s\n", stu.id );
        printf("专业:%s\n",stu.major);
        printf("年级:%s\n",stu.grade);
        printf("上机时长:%s\n",stu.Time);
        printf("所需费用:%.2f\n",getMoney(stu));
}

int isSameMajor(Student stu1, char* str){
    return strcmp(stu1.major, str) == 0;
}

int isSameid(Student stu1, char* str){
    return strcmp(stu1.id, str) == 0;
}

bool isSameName(Student stu1, char* str){
    return strcmp(stu1.name, str) == 0;
}

Student* p = NULL; // 学生数据地址

int showInfo(){
    int m;
    printf("1.修改上机每小时价格.\n");
    printf("2.输入n名上机学生.\n");
    printf("3.计算各学生上机费用.\n");
    printf("4.查询学生上机情况.\n");
    printf("5.机器使用情况.\n");
    printf("6:退出.\n");
    printf("请输入序号:");
    scanf("%d", &m);
    return m;
}

void menu4(){
    int n, i;
    char str[512] = {0};

    printf("1.查找条件为班级\n");
    printf("2.查找条件为学号\n");
    printf("3.查找条件为姓名\n");
    printf("请输入序号:");
    scanf("%d", &n);

    printf("请输入可找条件：");
    scanf("%s", str);

    switch (n)
    {
    case 1:
        for (i = 0; i < n; i++){
            if (isSameMajor(p[i], str)){
                showInfoOfStudent(p[i]);
            }
        }
        break;
    case 2:
        for (i = 0; i < n; i++){
            if (isSameid(p[i],str)){
                showInfoOfStudent(p[i]);
            }
        }
        break;
    case 3:
        for (i = 0; i < n; i++){
            if (isSameName(p[i],str)){
                showInfoOfStudent(p[i]);
            }
        }
        break;
    }
}
int main(){
    int flag = 1;
    int i;
    while (flag){
        system("cls");
        int m = showInfo();
        switch (m)
        {
        case 1:
            printf("请输入上机单价:");
            scanf("%f", &price);
            break;
        case 2:
            printf("请输入学生总数:");
            scanf("%d", &n);

            p = (Student*)malloc(sizeof(Student)*n);
            for (i = 0; i < n; i++){
                setInfo(p+i);
                clacTime(p+i);
                printf("\n");
            }
            break;
        case 3:
            for (i = 0; i < n; i++)
                showInfoOfStudent(p[i]);
            system("pause");
            break;
        case 4:
            menu4();
            system("pause");
            break;
        case 5:
            for (i = 0; i < n; i++)
                showAllInfo(p[i]);
            system("pause");
            break;
        case 6:
            flag = false;
            break;

        }
    }
    free(p);
    return 0;
}