代碼雨

代碼雨鴨（作者：小權權）

#include "stdio.h"
#include "windows.h"
#include "graphics.h"
#include "stdlib.h"
#include "time.h"

#define SCREEN_WIDTH 1366 //界面寬度
#define SCREEM_HEIGHT 768	//界面長度
#define DEF_RAIN_NUM 91 //雨的列數

//數字雨開始的位置
int g_nRainPos[DEF_RAIN_NUM] = { 0 };

//數字雨的字符串
char g_strRain[DEF_RAIN_NUM][10] = {0};

//隨機產生一個字母
char RamdomLetter(){
	char Letter = 0;

	while(1){
		Letter = rand() % 123; //隨機產生0-122的一個字符

		if((Letter >= 65 && Letter <= 90) || Letter >= 97){
			return Letter;
		}
	}

}
//隨機產生數字雨開始的位置
void randrain(){
	for(int i = 0; i < DEF_RAIN_NUM; i++){
		g_nRainPos[i] = rand() % SCREEM_HEIGHT;
	}
}
//初始化數字雨
void Digitalrain(){
	for(int i = 0; i < DEF_RAIN_NUM; i++){
		for(int j = 0; j < 10; j++){
			 g_strRain[i][j] = RamdomLetter();
		}
	}
}
//顯示雨
void ShowNumRain(){
	for(int i = 0 ; i < DEF_RAIN_NUM; i++){
		//設置字體
		settextcolor(RGB(255,255,255));
		for(int j = 0; j < 10; j++){
			outtextxy(i * 15,g_nRainPos[i] - 15 * j, g_strRain[i][j]);
			settextcolor(RGB(0, 255 - 28 * j, 0));
		}
	}
	for(i = 0; i < DEF_RAIN_NUM; i++){
		g_nRainPos[i]+= 15; //屏幕刷新后雨的位置下降15
	}
	for(i = 0; i < DEF_RAIN_NUM; i++){
		if(g_nRainPos[i] - 10 * 15 >= SCREEM_HEIGHT){
			g_nRainPos[i] = 0;
		}
	}
}

int main()
{
	srand((unsigned)time(NULL));
	initgraph(1366,768);//顯示屏蔽大小
	randrain();
	Digitalrain();
	BeginBatchDraw();
	while(1){
		Digitalrain();
		ShowNumRain();
		FlushBatchDraw();
		Sleep(100);//延遲0.1秒
		cleardevice();//清空
	}

	EndBatchDraw();
	closegraph();
	return 0;
}