爆刷PAT(甲级)——之【1008】 Elevator (20)(20 分)——C++

艰难的英语单词:     fulfilled       英 [fʊlˈfɪld]      满足的  adj.

题意:      给个电梯表,上行6秒一层,下来4秒一层,每层t停5秒,求总时间。

难点:     太简单了,我的羞于讲解。我还以为是有坑的。考虑了停在同一层去掉5s的延时细节以后,反而WA了。这种乙级的题目跑到甲级,我都不知道怎么办。

Code:      

#include<cstdio>
#include<cmath>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;
#define inf 1009
#define INF 0x3f3f3f3f
#define loop(x,y,z) for(x=y;x<z;x++)

int n,num[inf];
int sum;

void Input()
{
    cin>>n;
    int i;
    loop(i,0,n)cin>>num[i];
}

void Solve()
{
    int i;
    sum+=num[0]*6+5;
    loop(i,1,n)
    {
        sum+=5;
        if(num[i]>num[i-1])sum+=6*(num[i]-num[i-1]);
        else sum+=4*(num[i-1]-num[i]);
    }
}

void Output()
{
    cout<<sum<<endl;
}

int main()
{
    Input();
    Solve();
    Output();
    return 0;
}

 

C++源代码 注重类的交互 片段 #include using namespace std; #include "elevator.h" //Elevator class definition #include "person.h" //Person class definition #include "floor.h" //Floor class definition //constants that represent time required to travel //between floors and direction of the elevator const int Elevator::ELEVATOR_TRAVEL_TIME = 5; const int Elevator::UP = 0; const int Elevator::DOWN = 1; //constructor Elevator::Elevator( Floor &firstFloor, Floor &secondFloor) : elevatorButton( * this ), currentBuildingClockTime( 0 ), moving( false ), direction( UP ), currentFloor( Floor::FLOOR1 ), arrivalTime( 0 ), floor1NeedsService( false ), floor2NeedsService( false ), floor1Ref( firstFloor ), floor2Ref( secondFloor ), passengerPtr( 0 ) { cout << "elevator constrcuted" <<endl; }// end Elevator constructor //destructor Elevator::~Elevator() { delete passengerPtr; cout << "elevator destructed" << endl; }//end Elevator destructor //give time to elevator void Elevator::processTime( int time ) { currentBuildingClockTime = time; if ( moving ) //elevator is moving processPossibleArrival(); else processPossibleDeparture(); if ( !moving ) cout << "elevator at rest on floor " << currentFloor << endl; }// end function processTime // when elevator is moving, determine if it should stop void Elevator::processPossibleArrival() { //if elevator arrives at destination floor if ( currentBuildingClockTime == arrivalTime ) { currentFloor = ( currentFloor == Floor::FLOOR1 ? Floor::FLOOR2 : Floor::FLOOR1); //update current floor direction = ( currentFloor == Floor::FLOOR1 ? UP : DOWN ); //update direction cout << "elevator arrives on floor " << currentFloor <<endl; // process arrival at currentFloor arriveAtFloor( currentFloor == Floor::FLOOR1 ? floor1Ref : floor2Ref); return; }//end if //elevator still moving cout << "elevator moving " << ( direction == UP ? "UP" : "DOWN"
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