华为OJ 购物结算系统

#include<iostream>
#include<cstdio>
#include<list>
#include<string>
#include<cstring>
#define MAX_NUM 0xfffffff
using namespace std;
typedef struct
{
int goodID;
int goodNums;
} Good;

bool operator == (Good good1,Good good2)
{
return (good1.goodID==good2.goodID&&good1.goodNums==good2.goodNums);
}

typedef int (*GetmoneyFun)(int);
list<Good> g_goods_car;
int g_money=3000;
int g_credit=150;

//第一种商品(食品)的支付方式
int FirstGoodPay1(int goodNums)
{
return goodNums*10;
}

int FirstGoodPay2(int goodNums)
{
return goodNums*9;
}

int FirstGoodPay3(int goodNums)
{
int result=goodNums*10;
int count=result/100;
result-=count*18;
return result;
}
//第一种商品(食品)的支付方式

//第二种商品（服装）的支付方式
int SecondGoodPay1(int goodNums)
{
return goodNums*120;
}

int SecondGoodPay2(int goodNums)
{
int result=goodNums*120;
int count=result/200;
result-=count*40;
return result;
}
//第二种商品（服装）的支付方式

//第三种商品（书籍）的支付方式
int ThirdGoodPay1(int goodNums)
{
return goodNums*30;
}

int ThirdGoodPay2(int goodNums)
{
return goodNums*15;
}
//第三种商品（书籍）的支付方式

GetmoneyFun payFood[3]={FirstGoodPay1,FirstGoodPay2,FirstGoodPay3};
GetmoneyFun payCloth[2]={SecondGoodPay1,SecondGoodPay2};
GetmoneyFun payBook[2]={ThirdGoodPay1,ThirdGoodPay2};

void GetFinalPay()
{
int foodNums=0,clothNums=0,bookNums=0;
list<Good>::iterator it;
for(it=g_goods_car.begin();it!=g_goods_car.end();it++)
{
if((*it).goodID==0)
foodNums+=(*it).goodNums;
else if((*it).goodID==1)
clothNums+=(*it).goodNums;
else
bookNums+=(*it).goodNums;
}
int result=MAX_NUM;
bool useCredit=false;
for(int i=0;i<3;i++)
{
for(int j=0;j<2;j++)
{
for(int k=0;k<2;k++)
{
int now=payFood[i](foodNums)+payCloth[j](clothNums)+payBook[k](bookNums);
if(now>=500)
{
int payFinal_1=now*0.8<=g_money?now*0.8:MAX_NUM;
int payFinal_2=MAX_NUM;
int tempPay;
if(g_credit>=120)
{
tempPay=now-120;
}
else
{
tempPay=now-g_credit;
}
payFinal_2=tempPay<=g_money?tempPay:MAX_NUM;
if(payFinal_1<=payFinal_2)
{
now=payFinal_1;
useCredit=false;
}
else
{
now=payFinal_2;
useCredit=true;
}
}
else
{
if(now>g_money)
now=MAX_NUM;
else
useCredit=false;
}
if(now<result)
{
result=now;
}
}
}
}
if(result<MAX_NUM)
{
printf("%d\n",result);
if(useCredit)
{
if(g_credit>120)
{
g_credit-=120;
printf("120\n");
}
else
{
printf("%d\n",g_credit);
g_credit=0;
}
}
else
{
printf("0\n");
}
int creditAdd=result/10;
printf("%d\n",creditAdd);
g_credit+=creditAdd;
g_money-=result;
g_goods_car.clear();
}
else
{
printf("E006\n");
}
}

void Initial()
{
g_goods_car.clear();
g_money=3000;
g_credit=150;
printf("S001\n");
}

void PickGoods(int goodID,int goodNums)
{
if(goodID<0||goodID>2||goodNums<=0||goodNums>100)
{
printf("E002\n");
}
else if(!g_goods_car.empty()&&g_goods_car.size()>=5)
{
printf("E003\n");
}
else
{
Good newGood;
newGood.goodID=goodID;
newGood.goodNums=goodNums;
g_goods_car.push_back(newGood);
printf("S002\n");
}
}

void DeleteGoods(int goodID,int goodNums)
{
if(goodID<0||goodID>2||goodNums<=0||goodNums>100)
{
printf("E002\n");
}
else if(g_goods_car.empty())
{
printf("E005\n");
}
else
{
list<Good>::iterator it;
int count=0;
Good now;
now.goodID=goodID;
now.goodNums=goodNums;
for(it=g_goods_car.begin();it!=g_goods_car.end();it++)
{
if((*it)==now)
{
count++;
}
}
if(!count)
{
printf("E004\n");
}
else
{
g_goods_car.remove(now);
for(int i=0;i<count-1;i++)
g_goods_car.push_back(now);
printf("S003\n");
}
}
}

void BuyGoods()
{
if(g_goods_car.empty())
{
printf("E005\n");
}
else
{
GetFinalPay();
}
}

void Query(int queryType)
{
if(queryType==0)
{
printf("%d\n",g_money);
printf("%d\n",g_credit);
}
else
{
int foodNums=0,clothNums=0,bookNums=0;
list<Good>::iterator it;
for(it=g_goods_car.begin();it!=g_goods_car.end();it++)
{
if((*it).goodID==0)
foodNums+=(*it).goodNums;
else if((*it).goodID==1)
clothNums+=(*it).goodNums;
else
bookNums+=(*it).goodNums;
}
printf("%d\n",g_goods_car.size());
printf("%d\n",foodNums);
printf("%d\n",clothNums);
printf("%d\n",bookNums);
}
}

int main()
{
//freopen("data.txt","r",stdin);
char inputStr[200];
while(gets(inputStr)!=NULL)
{
int startPos=0;
int len=strlen(inputStr);
while(startPos<len&&inputStr[startPos++]==' ');
startPos--;
switch (inputStr[startPos])
{
case 'r':
Initial();
break;
case 'o':
{
int goodID,goodNums;
sscanf(&inputStr[startPos+2],"%d",&goodID);
sscanf(&inputStr[startPos+4],"%d",&goodNums);
PickGoods(goodID,goodNums);
}
break;
case 'c':
{
int goodID,goodNums;
sscanf(&inputStr[startPos+2],"%d",&goodID);
sscanf(&inputStr[startPos+4],"%d",&goodNums);
DeleteGoods(goodID,goodNums);
}
break;
case 'b':
BuyGoods();
break;
case 'l':
{
int queryType;
sscanf(&inputStr[startPos+2],"%d",&queryType);
Query(queryType);
}
break;
case 'e':
return 0;
default:
printf("E001\n");
break;
}
}
return 0;
}