对拍，考场干货

Link

Arunner.cpp

#include<bits/stdc++.h>
using namespace std;
long long tmp,cnt=0,t1=0,t2=0,lim;
inline void start(){tmp=clock();}
inline long long end(){return clock()-tmp;}
signed main(){
	cout<<"Input times(-1 for infinity):"<<endl;
	cin>>lim;
	while(cnt!=lim){
		system("Amake.exe > Adata.txt");
		start();
		system("1.exe < Adata.txt > A1.txt");
		t1+=end();
		start();
		system("2.exe < Adata.txt > A2.txt");
		t2+=end();
		cnt++;
		if(system("fc A1.txt A2.txt")){
			cout<<"There's something wrong."<<endl;
			system("pause"); 
			return 0;
		}
	}
	cout<<cnt<<" times running."<<endl;
	cout<<"Avg time of 1: "<<fixed<<setprecision(3)<<0.001*t1/cnt<<endl;
	cout<<"Avg time of 2: "<<fixed<<setprecision(3)<<0.001*t2/cnt<<endl;
	system("pause"); 
    return 0;
}

Amake.cpp

写随机数据的地方，不用 freopen。

缺省源：

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
#define int long long 
#define IOS ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define fir first
#define sec second
#define mkp make_pair
#define pb emplace_back
#define mem(x,y) memset(x,y,sizeof(x))
#define For(i,j,k) for(int i=j;i<=k;i++)
#define Rof(i,j,k) for(int i=j;i>=k;i--)
#define ckmx(a,b) a=max(a,b)
#define ckmn(a,b) a=min(a,b)
#define uid(i,j,k) uniform_int_distribution<ll> i(j,k)
#define Rand(s) s(rand_num)
unsigned seed=chrono::system_clock::now().time_since_epoch().count();
mt19937 rand_num(seed);

signed main(){IOS;

return 0;}

1.cpp & 2.cpp

两个比较程序，不用写 freopen。

注意每次对拍前要编译，否则 .exe 文件没被修改。