C++：文本文件的读取和输入

#include <iostream>#include <fstream>#include <math.h>using namespace std;int main(){int i, j;int a[10][5], b[10][5];cout<<"a："<<endl;for(i=0; i<10; i++){for(j=0; j<5; j++){a[i][j] = rand();cout << a[i][j] << " ";}cout << endl;}//输出a到文件cout<<"输出a到文件a.txt"<<endl;ofstream file1("a.txt");for(i=0; i<10; i++){for(j=0; j<5; j++){file1 << a[i][j] << " ";}file1 << endl;}file1.close();//从文件输入到bcout<<"从文件a.txt输入到b"<<endl;ifstream file2("a.txt");for(i=0; i<10; i++){for(j=0; j<5; j++){file2 >> b[i][j];}}file2.close();cout<<"b："<<endl;for(i=0; i<10; i++){for(j=0; j<5; j++){a[i][j] = rand();cout << b[i][j] << " ";}cout << endl;}return 0;}

讲解：http://www.cppblog.com/lmlf001/archive/2006/04/18/5815.html