acm的一些头文件和调试代码

  个人觉得单步调试麻烦且费时间,所以我两年时间里F4+watch基本没怎么用过,但由于"查看变量的值"这个需求总是存在的,并且调试时通常需要显示很多东西,printf写起来又比较蛋疼,恰巧在c++11上知道了可变参数模板这个新的东西,于是果断拿过来写debug代码了。

本地调试时用的,写在头文件里,然后只在本地包含它,OJ上忽略。[local.h] =>

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#ifndef _local
#define _local
namespace Debug {
    void print() {
        cout << endl;
    }
    template<typename T>
    void print(const T t) {
        cout << t << endl;
    }
    template<typename F, typename...R>
    void print(const F f, const R...r) {
        cout << f << " ";
        print(r...);
    }
    template<typename T>
    void print(T*p, T*q) {
        int d = p < q ? 1 : -1;
        while(p != q) {
            cout << *p << ", ";
            p += d;
        }
        cout << endl;
    }
    template<typename T1, typename T2>
    void print(pair<T1, T2> x) {
        print("first = "", x.first, "" second = "", x.second, """);
    }
}

class Timer {
private:
    clock_t _start;
    clock_t _end;

public:
    Timer() { start(); }
    void start() {
        _start = clock();
    }
    double get() {
        _end = clock();
        double usedtime = double(_end - _start) / CLK_TCK;
        cout << "used time: " <<  usedtime << " s
";
        return usedtime;
    }
};

#endif

头文件等=>

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#include <bits/stdc++.h>
using namespace std;
#ifndef ONLINE_JUDGE
    #include "local.h"
#endif
#define X first
#define Y second
#define pb(x) push_back(x)
#define mp(x, y) make_pair(x, y)
#define all(a) (a).begin(), (a).end()
#define mset(a, x) memset(a, x, sizeof(a))
#define mcpy(a, b) memcpy(a, b, sizeof(a))
typedef long long ll;
template<typename T>bool umax(T&a, const T&b){return b<=a?false:(a=b,true);}
template<typename T>bool umin(T&a, const T&b){return b>=a?false:(a=b,true);}

int main() {
#ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);
#endif // ONLINE_JUDGE

    return 0;
}

结果:

原文地址:https://www.cnblogs.com/jklongint/p/4822825.html