小白教你学习C++（9）文件流操作

#include <iostream>

using namespace std;

void main()

{

char *fname ="c:/2.txt";

char *fname1 ="c:/2ttrtgg.txt";

ofstream fout(fname1,ios::app,iso::ate);

if(!fout)

{

cout<<"如果打开失败"<<endl;]

return;

}

ofstream fout(fname,ios::out);

fout <<"hello world"<<endl; //wrint a file

fout <<"hello world"<<endl;

fout <<"1232424ld"<<endl;

fout <<"hello world"<<endl;

fout.close();

ifstream fin(fname); //一输入的形式打开文件

cout <<"hello..."<<endl;

char ch;

while(fin.get(ch))

{

cout<<ch;

}

system(pause);

return;

}

class teacher

{

public:

private:

int age;

char name[];

teacher()

{

age=30;

strcpy(name,""

teacher（int _age,char *_name）

{

int age;

strcpy(name,_name);

}

void printf()

{

cout<<"name"<<name<<age<<"age"<,endl;

}

}

}

//二进制文件的打开和写入

void main()

{

char *fname1 ="c:/2ttrtgg.dat";

ofstream fout(fname1,ios::binary);

if(!fout)

{

cout<<"如果打开失败"<<endl;]

return;

}

teacher T1(31,t31");

teacher T2(32,"t32");

fout.write((char*)&t1,sizeof(t1))

fout.write((char*)&t2,sizeof(t2));

ifstream fin(fname);

Teacher tmp;

fin.read(char*)&%tmp,aizeof(Teacher));

tmp.printf();

fin.read(char*)&%tmp,aizeof(Teacher));

tmp.printf();

}