C++小案例之b站弹幕

效果：

 窗口透明

 

 源代码：

 

点击查看代码

#include<cstdio>
#include<graphics.h>
#include<iostream>
#include<vector>
using namespace std;

struct DM
{
	char buff[256];//字符串
	COLORREF color;//颜色
	int x,y;//坐标
	int speed;//移动速度
	

};
int countDM = 0;
//准备弹幕1024条
struct DM dm[1024];

void function() {
	while (1) {
		char buff[256];
		cout << "请输入要发送的弹幕：" << endl;
		cin >> buff;
		strcpy_s(dm[countDM].buff, buff);
		dm[countDM].x = 500;
		dm[countDM].y = rand() % 200 + 200;//200-400随机
		dm[countDM].color = RGB(rand() % 256, rand() % 256, rand() % 256);
		dm[countDM].speed = rand() % 10 + 1;//1-10
		countDM++;
	}
}
int main() {
	int w = GetSystemMetrics(SM_CXFULLSCREEN);//桌面的宽度
	int h = GetSystemMetrics(SM_CYFULLSCREEN);//桌面的高度


	HWND hwnd=initgraph(w/2, h/2,SHOWCONSOLE);
	//窗口没有标题栏
	SetWindowLong(hwnd, GWL_STYLE, GetWindowLong(hwnd, GWL_STYLE) - WS_CAPTION);
	//设置窗口大小，位置，置顶
	SetWindowPos(hwnd, HWND_TOPMOST,//置顶
		0, 0,//窗口位置
		w / 2, h / 2,SWP_SHOWWINDOW
	);
	//设置窗口透明
	SetWindowLong(hwnd, GWL_EXSTYLE, GetWindowLong(hwnd, GWL_STYLE) | WS_EX_LAYERED);
	//显示的时候作颜色运算
	SetLayeredWindowAttributes(hwnd, RGB(0, 0, 0), 0, LWA_COLORKEY);
	CreateThread(NULL, NULL,(LPTHREAD_START_ROUTINE)function, NULL, NULL, NULL);
	
	while (1) {
		cleardevice();//清屏
		for (int i = 0; i < countDM; i++) {
			settextcolor(dm[i].color);
			outtextxy(dm[i].x, dm[i].y, dm[i].buff);
			dm[i].x -= dm[i].speed;
		}
		Sleep(200);
		
	}

	
	while (1);
	return 0;
}