C++学生成绩管理系统源代码

#include #include #include #include #include class Person

{ public:char name[8]; };

class student:public Person //构建学生类 {

public: friend void Manage(student stud[]) ; friend void Input(student stud[]) ; friend void Statistic(student stud[]); friend void Lookup(student stud[]) ; friend void Modify(student stud[]) ; friend void Output(student stud[]) ; friend void Insert(student stud[]) ; friend void Write(student stud[],int n); friend int Read(student stud[]); private: int num; char name[8]; char class_0[20]; float c_program; float english; float math; float average; int order; }stud[100];

class Manage:public student {};

void Write(student stud[],int n) //向文件中写入数据 { fstream myFile; myFile.open(\ if(!myFile) { cout<<\ abort(); } int count=n; myFile<

{

myFile<

myFile.close(); }

int Read(student stud[]) //从文件中读数据 {

fstream myFile;

myFile.open(\ if(!myFile) { cout<<\ abort(); } int count; myFile.seekg(0); myFile>>count; for(int i=0;i<=count;i++) {

myFile>>stud[i].class_0>>stud[i].num>>stud[i].name>>stud[i].c_program>>stud[i].english>>stud[i].math >>stud[i].average; }

myFile.close(); return count ; }

void Input(student stud[]) //---------------输入学生成绩 { system(\运行前清屏*/ int i=0; int flag; char sign; cout<>stud[i].class_0; loop: cout<<\学号:\ cin>>stud[i].num; int c=0; while(c

c++; if(stud[i].num==stud[i-c].num) { cout<<\你输入的学号已经存在!请重新输入!\ goto loop; } } cout<<\姓名:\ cin>>stud[i].name; do{ flag=0; cout<<\成绩:\ cin>>stud[i].c_program;

if(stud[i].c_program>100 ||stud[i].c_program<1) cout<<\请输入1-100之间的数字!\\n\ else

flag=1; }while(flag==0); do{ flag=0; cout<<\英语成绩:\ cin>>stud[i].english;

if(stud[i].english>100 ||stud[i].english<1) cout<<\请输入1-100之间的数字!\\n\ else

flag=1; }while(flag==0); do{ flag=0; cout<<\数学成绩:\ cin>>stud[i].math;

if(stud[i].math>100 ||stud[i].math<1)

cout<<\请输入1-100之间的数字!\\n\ else

flag=1; }while(flag==0); stud[i].average=(stud[i].c_program+stud[i].english+stud[i].math)/3; cout<<\平均分：\ cout<<\继续录入学生成绩?(y/n)\ cin>>sign; /*输入判断*/ i++; } Write(stud,i);

}

void Statistic(student stud[]) //---------------统计学生数据 {

system(\运行前清屏*/ int n=Read(stud); cout<

cout<<\班级\ \学号\ \姓名\ \平均分\for(int i=0;i

cout<

void Lookup(student stud[]) //---------------查找学生成绩 {int p;

cout<<\请选择1.按学号查找 2.按姓名查找\ cin>>p; if(p==1) { system(\运行前清屏*/ int n=Read(stud); int s; int i=0; cout<>s; while((stud[i].num-s)!=0&&i

int m=Read(stud); char t; int i=0; cout<>t; while(strcmp(stud[i].name-t,stud[i].name)==0&&i

void Modify(student stud[]) //---------------修改学生成绩 { system(\运行前清屏*/ int n=Read(stud); int s,a; float q; int i=0; cout<>s; while((stud[i].num-s)!=0&&i

cout<