C++实现的一个学生成绩管理示例

Sian

[C++] 纯文本查看 复制代码

//
//  main.cpp
//  Hello
//
//  Created by 余西安 on 16/5/19.
//  Copyright © 2016年 Sian. All rights reserved.
//

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

// 创建基本数据结构
struct Student{
    int id;
    char name[10];
    int score[3];
};

// 创建数据存储体
Student sa[100];
int count = 0;

// 创建实体对象
Student create(){
    Student s;
    printf("ID:");
    scanf("%d", &s.id);
    printf("Name:");
    scanf("%s", s.name);
    printf("Score:");
    scanf("%d, %d, %d", &s.score[0], &s.score[1], &s.score[2]);
    return s;
}

// 创建添加函数
int add(const Student *s){
    if (count > 100) return -1;
    sa[count] = *s;
    count++;
    return 0;
}

// 创建查找方法
int find(char name[10], Student *s){
    for(int i = 0; i < count ; i++){
        Student fs = sa[i];
        if (strcmp(name, fs.name) == 0){
            s->id = fs.id;
            strcpy(s->name, fs.name);
            s->score[0] = fs.score[0];
            s->score[1] = fs.score[1];
            s->score[2] = fs.score[2];
            return 0;
        }
    }
    return -1;
}

// 创建展现方法
void list(){
    if (count == 0){
        printf("Nothing...\n");
        return;
    }
    printf("---------------------\n");
    printf("ID\tName\tScore\t\n");
    printf("---------------------\n");
    for (int i = 0; i < count; i++){
        Student s = sa[i];
        printf("%d\t%s\t%d,%d,%d\n", s.id, s.name, s.score[0], s.score[1], s.score[2]);
    }
    printf("---------------------\n");
}

int main(){
    while(true){
        char cmd[10];
        printf(">");
        scanf("%s", cmd);
        // 录入成绩
        if(strcmp(cmd, "add") == 0){
            Student s = create();
            int resutl = add(&s);
            if (resutl == 0) printf("添加成功！\n");
            if (resutl == -1) printf("添加失败！\n");
            continue;
        }
        if (strcmp(cmd, "list") == 0){
            list();
            continue;
        }
        if(strcmp(cmd, "exit") == 0){
            printf("Bye!\n");
            break;
        }
        if (strcmp(cmd, "count") == 0){
            printf("Total:%d\n", count);
            continue;
        }
        if (strcmp(cmd, "find") == 0){
            Student s;
            char name[10];
            printf("请输入需要查询的学生姓名：");
            scanf("%s", name);
            int result = find(name, &s);
            if (result == 0) printf("%d\t%s\t%d,%d,%d\n", s.id, s.name, s.score[0], s.score[1], s.score[2]);
            if (result == -1) printf("没有查询到相关信息\n");
            continue;
        }
        printf("Error Code, please input code like \"add\", \"list\", \"exit\", \"count\"\n");
    }
    return 0;
}

Sian

调试输出结果：

[C++] 纯文本查看 复制代码

>?
Error Code, please input code like "add", "list", "exit", "count"
>list
Nothing...
>add
ID:1
Name:sian
Score:1,2,3
添加成功！
>list
---------------------
ID	Name	Score	
---------------------
1	sian	1,2,3
---------------------
>count
Total:1
>find
请输入需要查询的学生姓名：sian
1	sian	1,2,3
>exit
Bye!
Program ended with exit code: 0