代码：

#include<bits/stdc++.h>
#include<windows.h>
#include<conio.h>
#define W 100
#define H 42
using namespace std;
int d[5][2]={{0,-1},{0,1},{-1,0},{1,0},{0,0}};
char cj[4]={72,80,75,77};
int mymap[1000][1000];
int handsome=0;
string sym = "█ ";
int mode = 0;
int ax,ay;
void color(int a)
{
	SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),a);
}

void gxy(int x,int y)
{
	COORD pos;
	pos.X=2*x;
	pos.Y=y;
	SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),pos);
}

class player
{
	public:
		int x;
		int y;
		int p;
		int dir;
		bool sw;
		int injur;
		void clear()
		{
			gxy(x,y);
			if(handsome == 1){
				cout<<"空";
			}else if(mode == 0){
				cout<<"█ ";
				mymap[x+ay][y+ax] = p;
			}else if(mode == 1){
				cout<<"  ";
				mymap[x+ay][y+ax] = 0;
			}else if(mode == 2){
				cout<<"█ ";
			}
			return;
		}
		void draw()
		{
			color(p);
			if(mode == 2&&handsome == 0){
				color(mymap[x+ay][y+ax]);
			}
			clear();
			if(2*x>=W-4){
				x--;
				gxy(x+1,y);
				cout<<"  ";
			}
			if(y>=H-2){
				y--;
				gxy(x,y+1);
				cout<<"  ";
			}
			if(x<=1){
				x++;
				gxy(x-1,y);
				cout<<"  ";
			}
			if(y<=1){
				y++;
				gxy(x,y-1);
				cout<<"  ";
			}
			x+=d[dir][0];
			y+=d[dir][1];
			color(12);
			gxy(x,y);
			cout<<"█ ";
			gonggao();
			return;
		}
		void gonggao(){
			gxy(0,0);
			color(15);
			cout<<"目前状态：";
			if(handsome==1){
				cout<<"占位";
			}else if(mode == 1){
				cout<<"橡皮"; 
			}else if(mode == 0){
				cout<<"画笔";
			}else if(mode == 2){
				cout<<"移动";
			}
			cout<<"    目前颜色：";
			color(p);
			cout<<"█ ";
			cout<<"                                                                        \n"; 
			
		}
		void shuaxin(int bx,int by){
			for(int i = bx;i < 42+bx;i++){
				for(int j = by;j < 50+by;j++){
					gxy(j-by,i-bx-1);
					color(mymap[j][i-1]);
					cout<<"█ ";
				}
				cout<<'\n';
			}
		}
};
player p;
int main(){
	p.p = 15;
	p.dir = 1;
	p.x = 5;
	p.y = 2;
	char a;
	int cl = 8;
	HANDLE handle = GetStdHandle(STD_OUTPUT_HANDLE);
	CONSOLE_CURSOR_INFO CursorInfo;
	GetConsoleCursorInfo(handle, &CursorInfo);
	CursorInfo.bVisible = false;
	SetConsoleCursorInfo(handle, &CursorInfo);
	system("mode con cols=100 lines=42");
	cout<<"小林君制作 \n上下左右控制方向 \n空格换模式 \n1~7换颜色 \n9和0换深浅 \nz占位（移动，刷新，可清除） \nq清屏 \nwasd移动画布（略有卡顿） \nn刷新 \n按任意控制键开始作图";
	while(1){
		if(kbhit()){
			for(int i = 0;i < H;i++){
				gxy(0,i);
				cout<<"                                                                                                                  \n";
			} 
			break;
		}
	}
	while(1){
		if(kbhit()){
			a = getch();
			if(a == ' '){
				mode++;
				mode = mode%3;
				p.dir = 4;
				p.draw();
				handsome=0;
				continue;
			}else if(a <= '7'&&a>='1'){
				p.p = a-'0'+cl;
				p.dir = 4;
				p.draw();
				continue;
			}else if(a=='9'){
				p.p = min(p.p,(p.p+8)%16);
				cl = 0;
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == '0'){
				p.p = max(p.p,(p.p+8)%16);
				cl = 8;
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == 'z'){
				mode == 1;
				p.draw();
				handsome = 1-handsome;
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == 'q'){
				memset(mymap,0,sizeof(mymap));
				p.shuaxin(ax,ay);
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == 'w'){
				mode = 2;
				ax++;
				ax = max(ax,0);
				ax = min(ax,999);
				p.shuaxin(ax,ay);
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == 'a'){
				mode = 2;
				ay++;
				ay = max(ay,0);
				ay = min(ay,999);
				p.shuaxin(ax,ay);
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == 's'){
				mode = 2;
				ax--;
				ax = max(ax,0);
				ax = min(ax,999);
				p.shuaxin(ax,ay);
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == 'd'){
				mode = 2;
				ay--;
				ay = max(ay,0);
				ay = min(ay,999);
				p.shuaxin(ax,ay);
				p.dir = 4;
				p.draw();
				continue;
			}else if(a == 'n'){
				p.shuaxin(ax,ay);
				p.dir = 4;
				p.draw();
				continue;
			}
			a = getch();
			if(a == cj[0]){
				p.dir = 0;
			}else if(a == cj[1]){
				p.dir = 1;
			}else if(a == cj[2]){
				p.dir = 2;
			}else if(a == cj[3]){
				p.dir = 3;
			} else{
				p.dir = 4;
			}
			p.draw();
		}
		Sleep(100);
	}
}

如果出bug，把完整方块后的空格删掉