如何在现有文本文件的末尾附加一些文本

Question

如果这是可能的，那么任何帮助都会很棒

这个代码我已经试过了，

float deposit (float balance)
{


     double amount; 
    system("cls");
    cout<<"Enter the amount you wish to deposit"<<endl; 
    cin>>amount; 


    ofstream newBalance;                        
    newBalance.open ("deposit.txt", fstream::app);
    newBalance<<amount; 
    newBalance.close();

    balance = balance + amount; 
    writeBalance(balance); 
    return balance;  
}
//This is a function to allow the user to increase their balance 

Answer 1

你可能想放

fstream::out | fstream::app

而不仅仅是fstream::app

你可以看看：

http://www.cplusplus.com/reference/fstream/fstream/open/

要换行，只需：

newBalance<<amount<<"\n";