---------学生信息管理系统----------

/**程序的版权和版本声明部分：*Copyright(c)2014，烟台大学计算机学院学生*All rights reserved.*文件名称：*作者：田成琳*完成日期：2014 年 3月 6 日*版本号：v1.0*对任务及求解方法的描述部分：*输入描述: -*问题描述：学生信息管理系统*程序输出：学生信息*问题分析：*算法设计：*/#include<iostream>#include<cstdlib>using namespace std;struct Student{    int stunum;    string name;    string sex;    int age;    double score;    int state;//代表学生状态 1为正常 0为删除};void menu();void increase();void search();void delet();void show();void sort();Student A[20]= {{10001,"王刚","男",18,88.00,1},    {10002,"张国立","男",19,86.50,1},    {10003,"邓婕","女",17,88.00,1},    {10004,"李幼斌","男",20,90.50,1},    {10005,"王菲","女",18,88.00,1}};int size=5;//代表数组中原有元素个数int main(){    menu();    return 0;}void menu(){    int chose;    cout <<"请选择以下命令：" <<endl;    cout<<"1.增加学生信息"<<endl;    cout<<"2.查找学生信息"<<endl;    cout<<"3.删除学生信息"<<endl;    cout<<"4.显示学生信息"<<endl;    cout<<"5.根据学生成绩排序"<<endl;    cout<<"0.退出"<<endl;    cin>>chose;    switch(chose)    {    case 0:        exit(1);    case 1:        increase();        menu();        break;    case 2:        search();        menu();        break;    case 3:        delet();        menu();        break;    case 4:        show();        menu();        break;    case 5:        sort();        show();        menu();    }}void increase(){    cout<<"请输入学号、姓名、性别、年龄、成绩："<<endl;    size=size+1;    cin>>A[size].stunum>>A[size].name>>A[size].sex>>A[size].age>>A[size].score;    A[size].state=1;    cout<<"增加成功!"<<endl;}void search(){    int num,chose,i;    string sname;    cout<<"请输入查找方式："<<endl;    cout<<"1.学号查找："<<endl;    cout<<"2.姓名查找："<<endl;    cin>>chose;    if(chose==1)    {        cout<<"请输入学号："<<endl;        cin>>num;        for(i=0; i<=size; i++)        {            if((num==A[i].stunum)&&(A[i].state=1))            {                cout<<"学号  姓名  性别  年龄  成绩"<<endl;                cout<<A[i].stunum<<"  "<<A[i].name<<"  "<<A[i].sex<<"    "<<A[i].age<<"    "<<A[i].score<<endl;                break;            }        }        if((num!=A[i].stunum)||(A[i].state=0))        {            cout<<"查无此人!"<<endl;        }    }    else    {        cout<<"请输入姓名："<<endl;        cin>>sname;        for(i=0; i<=size; i++)        {            if(sname==A[i].name)            {                cout<<"学号 姓名 性别 年龄 成绩"<<endl;                cout<<A[i].stunum<<" "<<A[i].name<<" "<<A[i].sex<<" "<<A[i].age<<" "<<A[i].score<<endl;                break;            }        }        if((sname!=A[i].name)||(A[i].state=0))        {            cout<<"查无此人!"<<endl;        }    }}void delet(){    int num,i;    cout<<"请输入要删除的同学的学号："<<endl;    cin>>num;    for(i=0; i<=size; i++)    {        if(num==A[i].stunum)        {            A[i].state=0;            cout<<"删除成功！"<<endl;            break;        }        else        {            cout<<"查无此人!"<<endl;            menu();        }    }}void show(){    int i;    for(i=0; i<=size; i++)    {        if(A[i].state==1)        {            cout<<A[i].stunum<<"  "<<A[i].name<<"  "<<A[i].sex<<"  "<<A[i].age<<"  "<<A[i].score<<endl;        }    }}void sort(){    int i,j,chose;    Student t;    cout<<"请输入排序方式："<<endl;    cout<<"1.学号排序(升序)"<<endl;    cout<<"2.成绩排序(降序)"<<endl;    cin>>chose;    if(chose==1)    {        for(i=0; i<size-1; i++)        {            for(j=i+1; j<size; j++)            {                if(A[i].stunum>A[j].stunum)                {                    t=A[i];                    A[i]=A[j];                    A[j]=t;                }            }        }    }    else    {        for(i=0; i<size-1; i++)        {            for(j=i+1; j<size; j++)            {                if(A[i].score<A[j].score)                {                    t=A[i];                    A[i]=A[j];                    A[j]=t;                }            }        }    }}

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