C++计算订单价格

短命女 2024-04-17 23:18 61阅读 0赞

> 某老板想要一个能快速计算订单价格的程序，请你帮他设计一个类：   
> 1、这个类里需要原价和数量，原价从一个数组中读出即可（自行定义数组），数量需要初始化。   
> 2、老板会不定期调整价格，调整的方式是通过调整一个价格系数，这个系数乘以原价即为最终价格，这个折扣会影响到所有产品。

Orders.h

#pragma once
    #include<iostream>
    using namespace std;
    class Orders {
    	static double* m_s_OriginalCost;
    	int m_size;
    public:
    	Orders();
    	~Orders();
    	static void input(int n);
    	static void Free();
    	double count(int n);
    };

Orders.cpp

#include "Orders.h"
    
    Orders::Orders() {
    	m_size = 0;
    }
    
    double Orders::count(int n) {
    	double sum = 0;
    	double m = 0;
    	cout << "请输入价格系数\n";
    	cin >> m;
    	for (int i = 1; i <= n; ++i) {
    		cout << "请输入产品" << i << "的数量\n";
    		cin >> m_size;
    		sum += m_size * m_s_OriginalCost[i] * m;
    	}
    	return sum;
    }
    void Orders::input(int n) {
    	if (m_s_OriginalCost == nullptr) {
    		m_s_OriginalCost = new double[n + 1];
    	}
    	else if (n > m_s_OriginalCost[0]) {
    		Free();
    		m_s_OriginalCost = new double[n + 1];
    	}
    	m_s_OriginalCost[0] = n;
    	for (int i = 1; i <= n; ++i) {
    		cout << "请输入产品" << i << "的原价\n";
    		cin >> m_s_OriginalCost[i];
    	}
    }
    void Orders::Free() {
    	delete m_s_OriginalCost;
    }
    Orders::~Orders() {
    }
    double* Orders::m_s_OriginalCost = nullptr;

main.cpp

#include"Orders.h"
    
    int main() {
    	int n;
    	cout << "请输入产品类型数\n";
    	cin >> n;
    	Orders::input(n);//输入原价, 如需更改原价重新调用
    	Orders a;
    	double m = a.count(n);
    	cout << "订单价格为:" << m << endl;
    	//更改原价, 产品数, 数量
    	cout << "请重新输入产品类型数\n";
    	cin >> n;
    	Orders::input(n);
    	m = a.count(n);
    	cout << "订单价格为:" << m << endl;
    
    	Orders::Free();
    	system("pause");
    	return 0;
    }

运行结果如下 :

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMDcxMDY4_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMDcxMDY4_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/b1fecd120ba0465bbedad307a5738649.png