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【Python】简单的文件读写

作者:sudohou / 发布于2013/6/4/ 1162


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

	int win(string);
	int output(int, string);
	int input(int, string);

	int main()
	{
	string filename;
	cout << "请输入文件路径：";
	cin >> filename;
	win(filename);
	return 0;
	}

	int win(string filename)
	{
	int n,i,o;
	cin.clear();
	cout << "\n1.文件输出" << endl;
	cout << "2.文件输入" << endl;
	cout << "3.退出" << endl;
	cout << "请选择操作：";
	cin >> n;
	switch(n)
	{
	 case 1:
	 {
	 cout << "\n1.输出每一行" << endl;
	 cout << "2.输出每个单词" << endl;
	 cout << "请选择文件输出操作：";
	 cin >> o;
	 output(o,filename);
	 break;
	 }
	 case 2:
	 {
	 cout << "\n1.清空并输入" << endl;
	 cout << "2.附加输入" << endl;
	 cout << "请选择文件输入操作：";
	 cin >> i;
	 input(i,filename);
	 break;
	 }
	 case 3:
	 cout << "\n谢谢使用！" << endl;
	 break;
	}
	}

	int output(int o, string filename)
	{
	ifstream out;
	out.clear();
	out.open(filename.c_str());
	string ostr;
	cout << filename << "文件内容为：" << endl;
	switch(o)
	{
	 case 1:
	 {
	 while(getline(out,ostr))
	 cout << ostr << endl;
	 out.close();
	 return win(filename);
	 }
	 case 2:
	 {
	 while(out >> ostr)
	 cout << ostr << endl;
	 out.close();
	 return win(filename);
	 }
	}
	}

	int input(int i, string filename)
	{
	ofstream in;
	string istr;
	cout << "\n请输入文件内容(Ctrl+Z to end)：" << endl;
	switch(i)
	{
	 case 1:
	 {
	 in.clear();
	 in.open(filename.c_str(), fstream::out|fstream::trunc);
	 while(getline(cin,istr))
	 in << istr;
	 cout << "文件成功写入" << endl;
	 in.close();
	 return win(filename);
	 }
	 case 2:
	 {
	 in.clear();
	 in.open(filename.c_str(), fstream::out|fstream::app);
	 while(getline(cin,istr))
	 in << istr;
	 cout << "文件写入成功" << endl;
	 in.close();
	 return win(filename);
	 }
	}
	}

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