eee102/as2/ex2/archer.cpp

//=======================
//      archer.cpp
//=======================
#include "archer.h"
#include <iomanip>      // use for setting field width
#include <ctime>       // use for generating random factor
#include <stdlib.h>
using namespace std;
// constructor. default values don't need to be repeated here
archer::archer(int lv_in, string name_in)
{
    role=ar;    // enumerate type of job
    LV=lv_in;
    name=name_in;
    
    // Initialising the character's properties, based on his level
    HPmax=150+8*(LV-1);     // HP increases 8 point2 per level
    HP=HPmax;
    MPmax=75+2*(LV-1);      // MP increases 2 points per level
    MP=MPmax;
    AP=25+4*(LV-1);         // AP increases 4 points per level
    DP=25+4*(LV-1);         // DP increases 4 points per level
    speed=25+2*(LV-1);      // speed increases 2 points per level
    
    playerdeath=0;
    EXP=LV*LV*75;
    bag.set(lv_in*(rand()%2), lv_in*(rand()%2));
}

void archer::isLevelUp()
{
    if(EXP>=LV*LV*75)
    {
        LV++;
        AP+=4;
        DP+=4;
        HPmax+=8;
        MPmax+=2;
        speed+=2;
        bag.set(bag.nOfHeal()+LV, bag.nOfMW()+LV);
        cout<<name<<" Level UP!"<<endl;
        cout<<"Get " << LV << " Heal and " << LV << " Magic Water!"<<endl;
        cout<<"HP improved 8 points to "<<HPmax<<endl;
        cout<<"MP improved 2 points to "<<MPmax<<endl;
        cout<<"Speed improved 2 points to "<<speed<<endl;
        cout<<"AP improved 4 points to "<<AP<<endl;
        cout<<"DP improved 5 points to "<<DP<<endl;
        system("pause");
        isLevelUp();    // recursively call this function, so the character can level up multiple times if got enough exp
    }
}

bool archer::attack(player &p)
{
    double HPtemp=0;        // opponent's HP decrement
    double EXPtemp=0;       // player obtained exp
    double hit=1;           // attach factor, probably give critical attack
    srand((unsigned)time(NULL));        // generating random seed based on system time
    int attack = (speed*1.8)/p.DP;  //depand on player's speed and p.DP

    // If speed greater than opponent, you have some possibility to do double attack
    if ((speed>p.speed) && (rand()%100<(speed-p.speed)))        // rand()%100 means generates a number no greater than 100
    {
        HPtemp=(int)((attack)*AP*5/(rand()%4+10));     // opponent's HP decrement calculated based their AP/DP, and uncertain chance
        cout<<name<<"'s quick strike hit "<<p.name<<", "<<p.name<<"'s HP decreased "<<HPtemp<<endl;
        p.HP=int(p.HP-HPtemp);
        EXPtemp=(int)(HPtemp*1.2);
    }

    // If speed smaller than opponent, the opponent has possibility to evade
    else if ((speed<p.speed) && (rand()%50<1))
    {
        cout<<name<<"'s attack has been evaded by "<<p.name<<endl;
        system("pause");
        return 1;
    }

    // 10% chance give critical attack
    else
    {
        if(rand()%100<=10) {
            hit=1.5;
            cout<<"Critical attack: ";
        }
        // Normal attack
    //<!-- change
        HPtemp=(int)(((attack)*AP*5/(rand()%4+10)) * hit);
    //-->
        cout<<name<<" uses shoot, "<<p.name<<"'s HP decreases "<<HPtemp<<endl;
        EXPtemp=(int)(EXPtemp+HPtemp*1.2);
    //<!-- luck
        p.HP=(int)(p.HP-HPtemp*((double)(rand() % 100 + 50) / (double)100));
    //-->

    }


    cout<<name<<" obtained "<<EXPtemp<<" experience."<<endl;
//<!-- luck
    EXP=(int)(EXP+EXPtemp*((double)(rand() % 100 + 50) / (double)100));
//-->
    system("pause");
    return 1;       // Attack success
}

bool archer::specialatt(player &p)
{
    if(MP<40)
    {
        cout<<"You don't have enough magic points!"<<endl;
        system("pause");
        return 0;       // Attack failed
    }
    else
    {
        MP-=40;         // consume 40 MP to do special attack
        
        //10% chance opponent evades
        if(rand()%100<=10)
        {
            cout<<name<<"'s shoooooooooooot attack has been evaded by "<<p.name<<endl;
            system("pause");
            return 1;
        }
        
        double HPtemp=0;        
        double EXPtemp=0;       
        //double hit=1;         
        //srand(time(NULL));        
//<!-- // Luck
        HPtemp=(int)(AP*1.2*((double)(rand() % 100 + 50) / (double)100)+20);        // not related to opponent's DP
//-->     
        EXPtemp=(int)(HPtemp*1.5);      // special attack provides more experience
        cout<<name<<" uses shoooooooooooot attack, "<<p.name<<"'s HP decreases "<<HPtemp<<endl;
        cout<<name<<" obtained "<<EXPtemp<<" experience."<<endl;
        p.HP=(int)(p.HP-HPtemp);
        EXP=(int)(EXP+EXPtemp);
        system("pause");
    }
    return 1;   // special attack succeed
}

// Computer opponent
void archer::AI(player &p)
{
    if ((HP<(int)((1.0*p.AP/DP)*p.AP*1.5))&&(HP+100<=1.1*HPmax)&&(bag.nOfHeal()>0)&&(HP>(int)((1.0*p.AP/DP)*p.AP*0.5)))
        // AI's HP cannot sustain 3 rounds && not too lavish && still has heal && won't be killed in next round
    {
        useHeal();
    }
    else
    {
        if(MP>=40 && HP>0.5*HPmax && rand()%100<=30)
            // AI has enough MP, it has 30% to make special attack
        {
            specialatt(p);
            p.isDead();     // check whether player is dead
        }
        else
        {
            if (MP<40 && HP>0.5*HPmax && bag.nOfMW())
                // Not enough MP && HP is safe && still has magic water
            {
                useMW();
            }
            else
            {
                attack(p);  // normal attack
                p.isDead();
            }
        }
    }
}