#include <iostream> using namespace std; int main(){ freopen("A+B.in","r",stdin); freopen("A+B.out","w",stdout); }

十分的简单，在此就不多说废话了，上题解：

//沟使OI格式 #include<bits/stdc++.h>//万能头：包括freopen的头文件 using namespace std; int main(){ //双引号加文件名.in,双引号加read缩写r,加stdin freopen("A+B.in","r",stdin); //双引号再加文件名.out,双引号加write缩写w,加stdout freopen("A+B.out","w",stdout); //中间敲上代码： int a,b; cin>>a>>b; cout<<a+b; //关闭文件:先stdin,再stdout fclose(stdin); fclose(stdout); //freopen||fclose要记 }

文件判题基本框架：

#include <iostream> using namespace std; int main(){ freopen("A+B.in","r",stdin); freopen("A+B.out","w",stdout); long long a,b; cin>>a>>b; cout<<a+b; fclose(stdin); fclose(stdout); return 0; }

题解

#include<iostream> #include<cstdio> using namespace std; int main(){ freopen("A+B.in","r",stdin); freopen("A+B.out","w",stdout); int a,b; cin>>a>>b; cout<<a+b; fclose(stdin); fclose(stdout); return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ freopen("A+B.in","r",stdin); freopen("A+B.out","w",stdout); long long a,b; cin>>a>>b; cout<<a+b; fclose(stdin); fclose(stdout); return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ freopen("A+B.in","r",stdin); freopen("A+B.out","w",stdout); int a,b;cin>>a>>b; cout<<a+b; fclose(stdin); fclose(stdout); return 0; }