文件输入输出操作

#include <fstream>#include <iostream>using namespace std;int main(){int n,a[10],b[10];char c[100];ofstream f;ifstream k;f.open("t.txt");f<<1<<endl;f<<200<<" "<<123456<<endl;f<<300<<" "<<122131<<endl;f.close();f.open("t.txt",ios::in);f<<2<<endl;f.close();k.open("t.txt",ios::app);k>>n;for (int i=0;i<n;i++)k>>a[i]>>b[i];printf("%d\n",n);for (int i=0;i<n;i++)printf("%d %d\n",a[i],b[i]);return 0;}

以上为MFC亲测可用...

 

以下为翻转单词：

#include <cstdio>#include <cstdlib>#include <cstring>#include <iostream>#include <cmath>#include <algorithm>using namespace std;int main(){int t=0;string a[11000];freopen("in.txt","r",stdin);freopen("out.txt","w",stdout);for (;cin;)cin>>a[++t];for (int i=t-1;i>1;i--)cout<<a[i]<<" ";cout<<a[1]<<endl;fclose(stdin);fclose(stdout);return 0;}