C++语言程序设计形考三实验十二

上机实验12：文件流的应用一、实验内容下面的程序将5个Student记录按无格式方式写入一文件中，然后再读取出来。//头文件Student.h#include

<iostream>usingnamespace

std;classStudent{//学生类

charID[10];//学号

charname[20];//姓名

charsex[3];//性别public:

Student(){}

Student(constchar*id,constchar*n,constchar*s){

strcpy_s(ID,id);

strcpy_s(name,n);

strcpy_s(sex,s);

}

friendostream&operator<<(ostream&os,Students);};//将数组st中的num个学生记录写入filename所指定的文件中保存voidwriteToFile(Studentst[],intnum,constchar*filename);//将filename所指定的文件中的num个学生记录读入数组st中voidreadFromFile(Studentst[],intnum,constchar*filename);//程序文件Student.cpp#include

"Student.h"#include

<iomanip>#include

<fstream>ostream&operator<<(ostream&os,Students){

os<<setw(7)<<left<<s.ID<<setw(7)<<<<s.sex<<endl;

returnos;}voidwriteToFile(Studentst[],intnum,constchar*filename){//请补充缺失的语句Os.write((char*)&st[2],sizeof(Student));..

cout<<"已写入的记录："<<endl;

for(inti=0;i<5;i++)cout<<st[i];}voidreadFromFile(Studentst[],intnum,constchar*filename){//请补充缺失的语句..

cout<<"已读取的记录："<<endl;

for(inti=0;i<5;i++)cout<<st[i];}//主程序文件main.cpp#include

"Student.h"

Students1[]={

Student("111111","张三","男"),

Student("222222","李四","女"),

Student("333333","王五","男"),

Student("444444","赵六","男"),

Student("555555","吴七","女")

};

writeToFile(s1,5,"C:\\STUDENT.DAT");

Students2[5];

readFromFile(s2,5,"C:\\STUDENT.DAT");

return0;}程序的输出应该是：已写入的记录：111111张三男222222李四女333333王五男444444赵六男555555吴七女已读取的记录：111111张三男222222李四女333333王五男44444