2048(not completed)

#include <conio.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <time.h>
#include <windows.h>
using namespace std;

int map[16] = {0};
int step = 0;
char k;

void draw(){
    system( "cls" );
    cout << "steps:" << step << "\n";
    for( int i = 0 ; i < 16 ; i++ ){
        if( map[i] == 0 ){
            cout << "\t";
        }
        else{
            cout << map[i] << "\t";
        }
        if( i % 4 == 3 ){
            cout << "\n";
        }
    }
}

void random(){
    int x = 0;
    while( x < 1 ){
        int index = rand() % 16;
        int number = rand() % 5;
        if( number ==2 || number == 4 ){
            if(map[index] ==0){
                map[ index ] = number;
                x+=1;
            }
        }
    }
}
void init(){
    int x = 0;
    while( x < 3 ){
        int index = rand() % 16;
        int number = rand() % 5;
        if( number ==2 || number == 4 ){
            map[ index ] = number;
            x+=1;
        }
    }
}

void push_f(){
    for(int i = 3;i <=15 ; i +=4){
        for(int j = i-1 ; j>=i-3 ; j-- ){
            int k = j;
            while(1){
                if(map[k+1]==0){
                    int m_f = map[k+1];
                    map[k+1] = map[k];
                    map[k] = m_f;

                }
                else if(map[k+1]==map[k]){
                    map[k+1]= map[k+1]*2;
                    map[k]=0;
                }
                k=k+1;
                if(k ==i)break;
            }
        }
    }
}

push_s(){
    for(int i = 0;i <=12 ; i +=4){
        for(int j = i+1 ; j<=i+3 ; j++ ){
            int k = j;
            while(1){
                if(map[k-1]==0){
                    int m_s = map[k-1];
                    map[k-1] = map[k];
                    map[k] = m_s;

                }
                else if(map[k-1]==map[k]){
                    map[k-1]= map[k-1]*2;
                    map[k]=0;
                }
                k=k-1;
                if(k ==i)break;
            }
        }
    }
}

void push_e(){
    for(int i = 0;i <=3 ; i ++){
        for(int j = i+4 ; j<=i+12 ; j+=4 ){
            int k = j;
            while(1){
                if(map[k-4]==0){
                    int m_e = map[k-4];
                    map[k-4] = map[k];
                    map[k] = m_e;

                }
                else if(map[k-4]==map[k]){
                    map[k-4]= map[k-4]*2;
                    map[k]=0;
                }
                k=k-4;
                if(k ==i)break;
            }
        }
    }
}
void push_d(){
    for(int i = 12 ; i <=15 ; i ++){
        for(int j = i-4 ; j>=i-12 ; j-=4 ){
            int k = j;
            while(1){
                if(map[k+4]==0){
                    int m_d = map[k+4];
                    map[k+4] = map[k];
                    map[k] = m_d;

                }
                else if(map[k+4]==map[k]){
                    map[k+4]= map[k+4]*2;
                    map[k]=0;
                }
                k=k+4;
                if(k ==i)break;
            }
        }
    }
}

int main(){
    init();
    draw();
    while(1){
        if( kbhit() ){
            k = _getch();
            if( k == 'q' ){
                draw();
                break;
            }
            if( k == 'f' ){
                push_f();
                random();
                step++;
            }
            if( k == 's' ){
                push_s();
                random();
                step++;
            }
            if( k =='e' ){
                push_e();
                random();
                step++;
            }
            if( k == 'd' ){
                push_d();
                random();
                step++;
            }
        }
        draw();
        Sleep(100);
    }
}