#include<iostream>
#include"windows.h"
#include"time.h"
using namespace std;

 int sys_play=1;
 unsigned char key=0;
 int framecount=0,PlayTime=0,score=0,up_press=0;
 
 int map[20][10]={0};
 int sub[20][10]={0};

int random(int x){return rand()%(x+1);}
class block{
public:
 unsigned short x,y,index,cell[5][5],maxcell;

 void step(){
  int i,j,check;
  check=1;
  y+=1;
  for(i=0;i<maxcell&✓i++)for(j=0;j<maxcell&✓j++){
   if(cell[i][j]==1&&(sub[y-1+i][x-1+j]==1||y-1+i>=20)){y-=1; check=0;}
  }
  for(i=0;i<maxcell;i++)for(j=0;j<maxcell;j++){
   if(cell[i][j]==1&&(sub[y+i][x-1+j]==1||y-0+i>=20)){stop(); break;}
  }
 }

 void stop(){
  int i,j;
  for(i=0;i<maxcell;i++)for(j=0;j<maxcell;j++){
   if(cell[i][j]==1&&y-1+i>=0){sub[y-1+i][x-1+j]=1;}
  }
  x=5;
  y=0;
  setting();
 }

 block(){
  x=5;
  y=0;
  maxcell=5;
  srand((unsigned)time(NULL));
  setting();
 }

 void setting(){
  int i,j;
  index=random(6);
  for(i=0;i<5;i++)for(j=0;j<5;j++){
   cell[i][j]=0;
  }
  switch(index)
  {
  case 0:
   cell[0][2]=1;
   cell[1][2]=1;
   cell[2][2]=1;
   cell[3][2]=1;
   break;
  case 1:
   cell[1][2]=1;
   cell[2][2]=1;
   cell[3][2]=1;
   cell[3][3]=1;
   break;
  case 2:
   cell[1][2]=1;
   cell[2][2]=1;
   cell[3][2]=1;
   cell[3][1]=1;
   break;
  case 3:
   cell[2][2]=1;
   cell[3][2]=1;
   cell[2][3]=1;
   cell[3][3]=1;
   break;
  case 4:
   cell[2][0]=1;
   cell[2][1]=1;
   cell[2][2]=1;
   cell[3][1]=1;
   break;
  case 5:
   cell[1][2]=1;
   cell[2][1]=1;
   cell[2][2]=1;
   cell[3][1]=1;
   break;
  case 6:
   cell[1][2]=1;
   cell[2][2]=1;
   cell[2][3]=1;
   cell[3][3]=1;
   break;
  }
 }
};

class turn{
public:
 int cell[5][5];
};

block instance;

void KeyInput(){
 key=0;
 if(GetAsyncKeyState(VK_ESCAPE)){
  cout<<"Game End"<<endl;
  sys_play=0;
 }
 if(GetAsyncKeyState(VK_UP)&&!up_press){
  int i,j,check;
  turn subblock;
  up_press++;
  check=1;
  while(check){
   for(i=0;i<instance.maxcell;i++)for(j=0;j<instance.maxcell;j++){
    subblock.cell[i][j]=instance.cell[i][j];
   }
   for(i=0;i<instance.maxcell;i++)for(j=0;j<instance.maxcell;j++){
    instance.cell[i][j]=subblock.cell[4-j][i];
   }
   check=0;
   for(i=0;i<instance.maxcell;i++)for(j=0;j<instance.maxcell;j++){
    if(instance.cell[i][j]==1){
     if(instance.x-1+j<0||instance.x-1+j>=10||instance.y-1+i>=20){check=1;}
     else{if(sub[instance.y-1+i][instance.x-1+j]==1){check=1;}}
    }
   }
  }
 }else{up_press=0;}
 if(GetAsyncKeyState(VK_RIGHT)){
  int i,j;
  instance.x+=1;
  for(i=0;i<instance.maxcell;i++)for(j=0;j<instance.maxcell;j++){
   if(instance.cell[i][j]==1&&(instance.x-1+j<0||instance.x-1+j>=10||sub[instance.y-1+i][instance.x-1+j]==1)){instance.x-=1;}
  }
 }
 if(GetAsyncKeyState(VK_LEFT)){
  int i,j;
  instance.x-=1;
  for(i=0;i<instance.maxcell;i++)for(j=0;j<instance.maxcell;j++){
   if(instance.cell[i][j]==1&&(instance.x-1+j<0||instance.x-1+j>=10||sub[instance.y-1+i][instance.x-1+j]==1)){instance.x+=1;}
  }
 }
 if(GetAsyncKeyState(VK_DOWN)){
  int i,j;
  instance.y+=1;
  for(i=0;i<instance.maxcell;i++)for(j=0;j<instance.maxcell;j++){
   if(instance.cell[i][j]==1&&(instance.y-1+i>=20||sub[instance.y-1+i][instance.x-1+j]==1)){instance.y-=1;}
  }
 }
}

void Draw();

void GamePlay(){

 PlayTime+=1;
 
 KeyInput();

 if(PlayTime%15==0)
 {
  instance.step();
 }

 Draw();
}

void Draw(){
 int i,j,check=0;

 for(i=0;i<20;i++)for(j=0;j<10;j++){
  map[i][j]=sub[i][j];
 }

 for(i=0;i<instance.maxcell;i++)for(j=0;j<instance.maxcell;j++){
  if(instance.cell[i][j]==1&&instance.y-1+i>=0&&instance.y-1+i<20&&instance.x-1+j<10)
   map[instance.y-1+i][instance.x-1+j]=1;
 }

 for(i=0;i<20;i++){
  check=1;
  for(j=0;j<10;j+=1){
   if(sub[i][j]==0){check=0;}
  }
  if(check){
   int k,l;
   score+=100;
   for(l=i;l>0;l--)
   {
    for(k=0;k<10;k++)
    {
     sub[l][k]=sub[l-1][k];
    }
   }
  }
 }

 [...];
 cout<<"Score : "<<score<<endl;
 cout<<"▒▒▒▒[TETRIS]▒▒▒▒"<<endl;
 for(i=0;i<20;i++){
  cout<<"▒";
  for(j=0;j<10;j++){
   if(map[i][j]==1){cout<<"■";}
   else{cout<<"  ";}
  }
  cout<<"▒"<<endl;
 }
 cout<<"▒▒▒▒▒▒▒▒▒▒▒▒"<<endl;
}

int main(){
 clock_t curtime, oldtime;

 oldtime=clock();
 framecount=0;

 while(sys_play) {
  GamePlay();

  //framework
  while(1){
   curtime=clock();
   if(curtime-oldtime>33){
    oldtime=curtime;
    break;
   }
  }
  framecount++;
 }
 return 0;
}






한번씩 왼쪽에 딱 못붙은 블럭들이 있음 ㅠㅠ