c1.cpp

vc编程

#include "c1.h"
#include <iostream>
#include <string.h>

int hello;

Product::Product(char *n,int p,int q) //构造函数
{
	name=new char[strlen(n)+1];
	strcpy(name,n);
	price=p;
    quantity=q;

}
void Product::purchase(int money)    //购买产品，尽可能更多的产品（一次）
{
	int qty;
	qty=money/price;
	if(qty>quantity) qty=quantity;
	quantity-=qty;
	printf("购买了%d个%s,余钱为%d元！\n",qty,name,money-qty*price);

}
                                            //money为货款，提示：可能有余钱
void Product::remain()               //显示剩余产品数量
{
   printf("余下%s数目为%d件！\n",name,quantity);
}              //void purchase(int money,int number);
Product::~Product()
{
	delete []name;
}



void Product::purchase(int money,int number)    //购买产品，
{
	
	if(number>quantity) {printf("库存数目不足！\n");return;}
    if(number*price>money) {printf("资金不足！\n");return;}

	quantity-=number;
	printf("购买了%d个%s,余钱为%d元！\n",number,name,money-number*price);

}


main()
{
	int money;
	Product abc("pen",1,10);
    
    printf("输入资金(元)：");
	scanf("%d",&money);


	abc.purchase(money);
    abc.remain();
	return 0;

}