读取文件中int数据并排序输出到另外一个文件

来源：互联网发布：ar.drone编程编辑：程序博客网时间：2024/05/18 00:42

本文意在熟悉流对文件的操作

#include <iostream>#include <vector>#include <fstream>using namespace std;void Order(vector<int> &data){for (unsigned int i = 0; i < data.size(); i++){for (unsigned int j = i+1; j < data.size(); j++){if (data.at(i) > data.at(j)){data.at(i) ^= data.at(j);data.at(j) ^= data.at(i);data.at(i) ^= data.at(j);}}}}void printFunc(vector<int>& data){for (unsigned int i = 0; i < data.size(); i++){cout<<data.at(i)<<"\t";}cout<<endl;}void main( void ){vector<int>data;ifstream in("data.txt");if ( !in){cout<<"file error!";exit(1);}int temp;while (!in.eof()){in>>temp;data.push_back(temp);}in.close();printFunc(data);Order(data);printFunc(data);ofstream out("output.txt");if ( !out){cout<<"file error!";exit(1);}for (unsigned int i = 0 ; i < data.size() ; i++)out<<data[i]<<" ";out.close();}

上面一行是 data.txt 中的数据

下面一行是从小到大排序后输出到 output.txt 文件中的数据

0 0