C++ desktop is greedy for snakes, everyone who can pass the level is a master (Windows can be compiled)

Article directory 

• Realization principle
• Code implementation (see comments for details)

Realization principle

• First get the paths of all desktop apps.
• Then store them all in a structure, and store them in an array of pointers (the front points to the back).
• Later, it is enough to randomly generate food each time and judge whether it is KO each time.
• If you are interested, you can also look at the C++ Snake Endless Mode .

Code implementation (see comments for details)

#include <bits/stdc++.h>
#include <windows.h>
#include <commctrl.h>
#include <shlobj.h>
#define get GetAsyncKeyState
#define send SendMessageA
#define LVM LVM_SETITEMPOSITION
#define msg MessageBox
// 大小与速度（速度越小越快） 
const int S = 100, V = 300;
// 桌面
HWND D;
// 蛇的结构体 
typedef struct Snake {
    // 位置 
	int x, y;
    // 蛇的第几节
	int idx;
    // 下一节
	struct Snake* nxt;
} node;
// 蛇头
node* head;
node* t;
// 目前食物的位置
POINT food;
// 目前吃了多少食物 
int cnt, idx;
// 分辨率
int w, h;
// 共有多少食物 
int sum;
// 找路径 
char* Get() {
	LPITEMIDLIST pidl;
	LPMALLOC pShellMalloc;
	char s[200];
	if (SUCCEEDED(SHGetMalloc(&pShellMalloc))) {
		if (SUCCEEDED(SHGetSpecialFolderLocation(NULL, CSIDL_DESKTOP, &pidl)))	{
			SHGetPathFromIDListA(pidl, s);
			pShellMalloc -> Free(pidl);
		}
		pShellMalloc -> Release();
	}
	return s;
}
// 初始化 
void init() {
	srand((unsigned int)time(0));
	HWND grand = FindWindowA("Progman", "Program Manager"), fa = FindWindowExA(grand, NULL, "SHELLDLL_DefView", NULL);
	D = FindWindowExA(fa, 0, "SysListView32", "FolderView");
	sum = send(D, LVM_GETITEMCOUNT, 0, 0);
	w = GetSystemMetrics(SM_CXSCREEN);
	h = GetSystemMetrics(SM_CYSCREEN);
	head = (node*) malloc (sizeof head);
	head -> x = rand() % (w / S) * S;
	head -> y = rand() % (h / S) * S;
	head -> idx = 0;
	head -> nxt = NULL;
	for (int i = 0; i < sum; ++i) {
		send(D, LVM, i, (h << 16) + w);
	}
}
// 游戏界面 
void Game() {
	// 输出蛇头 
	send(D, LVM, head -> idx, (head -> y << 16) + head -> x);
A:
	food.x = rand() % (w / S) * S;
	food.y = rand() % (h / S) * S;
	// 如果新生成的食物位置和蛇头位置重合就重生成 
	if (head -> x == food.x && head -> y == food.y) {
		goto A;
	}
	// 输出食物 
	send(D, LVM, 1, (food.y << 16) + food.x);
	// 移动方向，最开始向右 
	node move; 
	move.x = 1;
	move.y = 0;
	// 都吃了就成功了 
	while (cnt < sum) {
		if (get(VK_UP)) {
			move.x = 0;
			move.y = -1;
		} 
		if (get(VK_DOWN)) {
			move.x = 0;
			move.y = 1;
		}
		if (get(VK_LEFT)) {
			move.x = -1;
			move.y = 0;
		}
		if (get(VK_RIGHT)) {
			move.x = 1;
			move.y = 0;
		}
		if (get(VK_ESCAPE)) {
			msg(D, TEXT("再见，下次再来玩呦~"), TEXT(""), MB_OK | MB_ICONEXCLAMATION);
			exit(0);
		}
		if (get(VK_SPACE)) {
			while (true) {
				Sleep(500);
				if (get(VK_SPACE)) {
					break;
				} 
			}
		}
		if (head -> x == food.x && head -> y == food.y) {
			++idx;
			++cnt;
			node* T;
			T = (node*) malloc (sizeof(node));
			T -> x = food.x;
			T -> y = food.y;
			T -> idx = idx;
			T -> nxt = NULL;
			t = head;
			while (t -> nxt != NULL) {
				t = t -> nxt;
			}
			t -> nxt = T;
			t = head;
			t -> x += move.x * S;
			t -> y += move.y * S;
			while (t != NULL) {
				send(D, LVM, t -> idx, (t -> y << 16) + t -> x);
				t = t -> nxt;
			}
		B:
			food.x = rand() % (w / S) * S;
			food.y = rand() % (h / S) * S;
			if (head -> x == food.x && head -> y == food.y) {
				goto B;
			}
			send(D, LVM, idx + 1, (food.y << 16) + food.x);
		} else {
			node t1, t2;
			t = head;
			t1.x = t -> x;
			t1.y = t -> y;
			t -> x += move.x * S;
			t -> y += move.y * S;
			send(D, LVM, t -> idx, (t -> y << 16) + t -> x);
			t = head -> nxt;
			while (t != NULL) {
				t2.x = t -> x;
				t2.y = t -> y;
				t -> x = t1.x;
				t -> y = t1.y;
				send(D, LVM, t -> idx, (t -> y << 16) + t -> x);
				t1.x = t2.x;
				t1.y = t2.y;
				t = t -> nxt;
			}
			if (head -> x > w || head -> x < 0 || head -> y > h || head -> y < 0) {
				msg(D, TEXT("孩纸你撞到墙了，重来吧"), TEXT(""), MB_OK | MB_ICONEXCLAMATION);
				exit(0);
			}
			t = head -> nxt;
			while (t != NULL) {
				if (t -> x == head -> x && t -> y == head -> y) {
					msg(D, TEXT("孩纸你撞到自己了，重来吧"), TEXT(""), MB_OK | MB_ICONEXCLAMATION);
					exit(0);
				}
				t = t -> nxt;
			}
		}
		Sleep(V);
	}
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {
	init();
	msg(D, TEXT("游戏规则：↑↓←→控制方向，空格暂停，再按一次空格继续，Esc退出。要好好记住哦~"), TEXT(""), MB_OK | MB_ICONEXCLAMATION);
	msg(D, TEXT("准备开始游戏..."), TEXT(""), MB_OK | MB_ICONEXCLAMATION);
	Game();
	return 0;
}