使用Ubuntu gedit写入文件

Question

我正在尝试编写一个写入已存在文件的简单程序.我收到此错误:

hello2.txt: file not recognized: File truncated
collect2: ld returned 1 exit status

我究竟做错了什么？(我尝试了两种方式的斜线,我仍然得到相同的错误.)

#include<iostream>
#include<fstream>
using namespace std;

int main()
{
    ofstream outStream;
    outStream.open(hello3.txt);
    outStream<<"testing";
    outStream.close;

    return 0;
}

Answer 1

它有两个错误:

1. hello3.txt是一个字符串,因此应该在引号中.

2. std :: ofstream :: close()是一个函数,因此需要括号.

更正后的代码如下所示:

#include <iostream>
#include <fstream>

int main()
{
    using namespace std; // doing this globally is considered bad practice.
        // in a function (=> locally) it is fine though.

    ofstream outStream;
    outStream.open("hello3.txt");
    // alternative: ofstream outStream("hello3.txt");

    outStream << "testing";
    outStream.close(); // not really necessary, as the file will get
        // closed when outStream goes out of scope and is therefore destructed.

    return 0;
}

请注意:此代码会覆盖以前在该文件中的所有内容.