C ++中的简单文件写入功能 [英] Simple file write function in C++
本文介绍了C ++中的简单文件写入功能的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有此代码:
// basic file operations
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
writeFile();
}
int writeFile ()
{
ofstream myfile;
myfile.open ("example.txt");
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile.close();
return 0;
}
为什么这不起作用?它给了我错误:
Why is this not working? it gives me the error:
1>------ Build started: Project: FileRead, Configuration: Debug Win32 ------
1> file.cpp
1>e:\documents and settings\row\my documents\visual studio 2010\projects\fileread\fileread\file.cpp(8): error C3861: 'writeFile': identifier not found
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
这只是一个简单的功能.我正在使用Visual Studio 2010.
and this is just a simple function. I'm using Visual Studio 2010.
推荐答案
对此有两种解决方案.您可以将方法放在调用它的方法之上:
There are two solutions to this. You can either place the method above the method that calls it:
// basic file operations
#include <iostream>
#include <fstream>
using namespace std;
int writeFile ()
{
ofstream myfile;
myfile.open ("example.txt");
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile.close();
return 0;
}
int main()
{
writeFile();
}
或声明原型:
// basic file operations
#include <iostream>
#include <fstream>
using namespace std;
int writeFile();
int main()
{
writeFile();
}
int writeFile ()
{
ofstream myfile;
myfile.open ("example.txt");
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile << "Writing this to a file.\n";
myfile.close();
return 0;
}
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