c++的高速公收费源码

原文地址：爱游巴士

程序功能：
在某高速公路出口收费处，对三种类型的车辆计费，大型车每公里0.5元，中型车每公里0.4元，小型车每公里0.3元,来车验条，根据行驶公里数即得应收款的金额。在交班时要统计出总数。

这里简单的整理了一个ExpressManager类，具体代码如下：
ExpressManager.h

#ifndef __EXPRESSMANAGER_H__
#define __EXPRESSMANAGER_H__

#include <memory>

enum e_CarType
{
        E_CARTYPE_S,
        E_CARTYPE_M,
        E_CARTYPE_B,
        E_CARTYPE_SIZE,
};

struct s_Car
{
        float passCharge;
        float trip ;
        enum e_CarType type;

};

static float CHARGE_DEF[E_CARTYPE_SIZE]={0.3F,0.4F,0.5F};
const int NAME_LEN=16;

class ExpressManager
{

public:
        
        explicit ExpressManager(const char* name="Express"):_passCharge(0.0f),_tempCharge(0.0f)
        {
                memcpy( _name,name,NAME_LEN );
        }

        ~ExpressManager(void){}

        // pass the express manager
        // @ car the pass car
        // @ passCharge the charge for passing 
        float Pass( const struct s_Car* car,float passCharge,float& rCharge );

        // show the charge for passing
        // @ car the pass car 
        float ShowCharge( const struct s_Car* car ) const ;

        
        float ShowTotal( ) const
        { 
                printf("	 Total is:%0.2f
",_passCharge);
                return _passCharge;
        }

        void PassCar();

        void PassTest();

private:

        // caculate the charge for passing
        // @ car the parss car
        // @ return !0 ，succss to get the value; -1 ,bad data
        inline float Caculate( const struct s_Car* car ) const
        {                
                return car->trip*CHARGE_DEF[car->type];
        }

        float _passCharge;
        float _tempCharge;
        char _name[NAME_LEN];
};

#endif

ExpressManager.cpp

#include "stdafx.h"
#include "ExpressManager.h"

// pass the express manager
// @ car the pass car
// @ passCharge the charge for passing 
float ExpressManager::Pass( const struct s_Car* car,float passCharge,float& rCharge )
{
        if( car !=NULL )
        {
                float need = Caculate( car );

                _tempCharge+=passCharge;

                if( _tempCharge >= need )
                {
                        _passCharge += need;

                        rCharge = _tempCharge - need;        

                        _tempCharge = 0;
                        return true;
                }
                else
                {

                        printf( "Fail to pass ! less %0.2f
",need-_tempCharge );

                        return false;
                }
        }
        else
        {
                printf("Fail to pass Null data!
");
        }
        return false;
}

// show the charge for passing
// @ car the pass car 
float ExpressManager::ShowCharge( const struct s_Car* car ) const 
{
        if( car != NULL )
        {
                return Caculate( car );
        }
        else
        {
                printf("Fail to show Null data!
");
                return 0.0f;
        }
}

void ExpressManager::PassCar()
{
        struct s_Car temp={0};
        float pCharge=0.0f;
        float rCharge=0.0f;

        printf("plz,input car info! e. type trip
");

        if( scanf_s("%d %f",&temp.type,&temp.trip )!= EOF )
        {
                temp.passCharge = ShowCharge( &temp );

                printf("plz pay %0.2f for passing
",temp.passCharge );

                while(true)
                {
                        if( scanf_s( "%f",&pCharge ) != EOF )
                        {
                                if( Pass( &temp,pCharge,rCharge ) )
                                {
                                        if( rCharge==0.0f)
                                        {
                                                printf("congratulation!  see you next time!
");
                                        }
                                        else
                                        {
                                                printf("congratulation! payback you %0.2f see you next time!
",rCharge);
                                        }
                                        break;
                                }
                        }
                }
        }
}

void ExpressManager::PassTest()
{
        int cmd = 0;
        
        while(true)
        {
                printf("welcome to %s
",_name);
                printf("	'p' - pass the car!
");
                printf("	's' - show the total charge!
");
                printf("	'q' - Exit!
");
                fflush(stdin);
                if( (cmd = getchar()) !=EOF )
                {
                        if( cmd == 'q' ) break;

                        else if( cmd == 's' )
                        {
                                ShowTotal();
                        }
                        else if( cmd == 'p' )
                        {
                                PassCar();
                        }
                }
        }
}

测试代码

#include "ExpressManager.h"
#include <stdio.h>

int main(int argc, char* argv[])
{
        ExpressManager *Express1=new ExpressManager("G2023");

        Express1->PassTest();

        return 0;
}