简单的学生成绩管理系统

/* 实现简单的学生成绩管理系统 */

#include <iostream>

using namespace std;
#define MAXZISE 50

// 结构体的定义
struct student_s
{
	long num;		// 学号
	string name;	// 姓名
	float score;	// 分数
};

// 类
class student_c
{
private:
	student_s student_struct[MAXZISE];	// 结构体数组
	int total;
	
public:
	student_c();
	
	int insert_seq(int i, student_s x);	
	int delete_seq(int i);
	void print_seq();
};

void menu();

int main(int argc, char *argv[])
{
	student_c student_object;	// 对象
	int choice;
	bool m = true;
	
	while (m)
	{
		menu();
		
		cin>>choice;
		switch (choice) 
		{
			case 1:
			{
				int i;
				student_s x;
				cout<<"输入插入位置：";
				cin>>i;
				cout<<"输入学号 姓名 成绩："<<endl;
				cin>>x.num>>x.name>>x.score;
				
				student_object.insert_seq(i, x);	// 插入
				cout<<"插入后："<<endl;
				student_object.print_seq();		// 查看
				break;
			}
			
			case 2:
			{
				int i;
				cout<<"输入删除位置：";
				cin>>i;
				
				student_object.delete_seq(i);	// 删除
				cout<<"删除后："<<endl;
				student_object.print_seq();
				break;
			}
			
			case 3:student_object.print_seq();break;
			
			case 0:
				m = false;
				
			default:
				break;
		}
	}
	
	return 0;
}

void menu(void)
{
	cout<<"1.插入"<<endl;
	cout<<"2.删除"<<endl;
	cout<<"3.查看"<<endl;
	cout<<"0.退出"<<endl;
	cout<<endl;
	cout<<"请选择：";
}

// 构造函数
student_c::student_c()
{
	total = 0;
}

//插入
int student_c::insert_seq (int i, student_s x)
{
	if (total == MAXZISE)
	{
		cout<<"talble is full!"<<endl;
		return -1;
	}
	if (i<1 || i>total+1)
	{
		cout<<"place is wrong!"<<endl;
	}
	
	for (int j=total-1; j>=i; j--)
	{
		student_struct[j+1] = student_struct[j];
	}
	
	student_struct[i-1] = x;
	total++;
	
	return 1;
}

// 删除
int student_c::delete_seq (int i)
{
	int j;
	if (i<1 || i>total)
	{
		cout<<"超出范围，不存在信息！"<<endl;
		return -1;
	}
	
	for (j=i; j<=total-1; j++)
	{
		student_struct[j-1] = student_struct[j];
	}
	
	total--;
	return 1;
}

// 打印所有
void student_c::print_seq(void)
{
	for (int i=0; i<=total-1; i++)
	{
		cout<<student_struct[i].num<<"    ";
		cout<<student_struct[i].name<<"    ";
		cout<<student_struct[i].score<<"    "<<endl;
	}
	cout<<endl;
}

结果：