c++文件读写

经历一系列会了忘会了忘我要把你记下来啦啦啦啦~不会忘啦~~~

写入文件：

void Card::Save()
{
ofstream outfile("card.dat",ios::out|ios::app);
if(!outfile)
{
cerr << "open error!" << endl;
exit(1);
}
outfile<<name<<" "<<number<<" "<<sex<<" "<<position<<" "<<balance<<" "<<loss<<" "<<kind<<" "<<password<<endl;
outfile.close();
}

 

ios：：app  追加文件写入

 

从文件导入内存：

void Management::Output()
{
ifstream CardFile("card.dat",ios::in);
if(!CardFile)
{
//exit(1);
return;
}
string name,sex,kind,position;
int password;
long num;
bool loss;
double balance;
User *user=NULL;
while(CardFile>>name>>num>>sex>>position>>balance>>loss>>kind>>password)
{
cout<<"姓名："<<name<<endl;
cout<<"号码："<<num<<endl;
cout<<"类别："<<kind<<endl;
cout<<"性别："<<sex<<endl;
cout<<"单位："<<position<<endl;
cout<<"余额："<<balance<<endl;
cout<<"是否挂失："<<loss<<endl<<endl;
user = new User(num,name,sex,kind,position,password,balance,loss);
order.push_back(user);
}
CardFile.close();
}

 

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