控制台画图的小程序（没有写保存功能，现在看看也懒得写了）

  1 #include <stdio.h>
  2 #include <windows.h>
  3 #include <conio.h>
  4 
  5 typedef struct        
  6 {
  7     int x;
  8     int y;
  9 }CursorPos;
 10 
 11 int Max_X = 0;                    // 画布行大小，为清屏做准备
 12 int Max_Y = 0;                    // 画布列大小，为清屏做准备
 13 
 14 void HideCursor(HANDLE hOutput);
 15 void GotoXy(HANDLE hOutput, int x, int y);
 16 int  GetMousePos(CursorPos *cr);
 17 int  GetKeyPress(HANDLE hOutput, char * choice);
 18 void ShowUsage(HANDLE hOutput);
 19 void InitScreen(HANDLE hOutput);
 20 void ReadFile(HANDLE hOutput);
 21 void SaveFile(HANDLE hOutput);
 22 
 23 int main(void)
 24 {
 25     char choice=1;
 26     FILE * fp;                        // 打开文件
 27     CursorPos cursor;                // 鼠标单击的逻辑坐标
 28     HANDLE hOutput = GetStdHandle(STD_OUTPUT_HANDLE);
 29     SetConsoleTitle("控制台画图游戏");
 30     HideCursor(hOutput);
 31     ShowUsage(hOutput);
 32 
 33     if((fp=fopen("draw.txt","r"))==NULL)    // 新建文件
 34         fp=fopen("draw.txt","w");
 35     fclose(fp);
 36 
 37     while(1)
 38     {
 39         if(GetMousePos(&cursor))
 40         {
 41             GotoXy(hOutput, cursor.x,cursor.y);
 42             printf("%c",choice);
 43         }
 44         GetKeyPress(hOutput, &choice);
 45     }
 46     return 0;
 47 }
 48 int GetMousePos(CursorPos *cursor)
 49 {    
 50     HANDLE hInput  = GetStdHandle(STD_INPUT_HANDLE); 
 51     INPUT_RECORD inRec;
 52     DWORD res;
 53 
 54     ReadConsoleInput(hInput, &inRec, 1, &res);
 55     if (inRec.EventType == MOUSE_EVENT && inRec.Event.MouseEvent.dwButtonState == FROM_LEFT_1ST_BUTTON_PRESSED) //鼠标左键
 56     {
 57         cursor->x = inRec.Event.MouseEvent.dwMousePosition.X;
 58         if(cursor->x > Max_X)
 59             Max_X = cursor->x;
 60         cursor->y = inRec.Event.MouseEvent.dwMousePosition.Y;
 61         if(cursor->y > Max_Y)
 62             Max_Y = cursor->y;
 63         
 64         return 1;
 65     }
 66     return 0;
 67 }
 68 int  GetKeyPress(HANDLE hOutput, char * choice)
 69 {
 70     HANDLE hInput = GetStdHandle(STD_INPUT_HANDLE);
 71     INPUT_RECORD inRec;
 72     DWORD res;
 73     ReadConsoleInput(hInput, &inRec, 1, &res);
 74 
 75     if(inRec.EventType == KEY_EVENT)
 76     {
 77         switch(inRec.Event.KeyEvent.wVirtualKeyCode)
 78         {
 79         case VK_ESCAPE  : InitScreen(hOutput);break;
 80         case VK_CONTROL : ReadFile(hOutput);break;
 81         case VK_MENU    : SaveFile(hOutput);break;
 82         default :    * choice =inRec.Event.KeyEvent.uChar.AsciiChar;
 83         }
 84         return 1;
 85     }
 86     return 0;
 87 }
 88 
 89 void HideCursor(HANDLE hOutput)
 90 {
 91     CONSOLE_CURSOR_INFO cursor_info = {1, 0};    
 92     SetConsoleCursorInfo(hOutput, &cursor_info);
 93 }
 94 
 95 /**********移动光标至(x,y)处************/
 96 void GotoXy(HANDLE hOutput, int x, int y)
 97 {
 98     COORD CursorPosd;    
 99     CursorPosd.X = x;
100     CursorPosd.Y = y;
101     SetConsoleCursorPosition(hOutput, CursorPosd);        
102 }
103 
104 /**************显示用法*****************/
105 void ShowUsage(HANDLE hOutput)
106 {
107     printf("用法：
");
108     printf("一、按住键盘按键和鼠标左键可以改变笔触类型
");
109     printf("二、按下 ESC 键清空屏幕
");
110     printf("三、按下 CTRL 键打开文件
");
111     printf("四、按下 ALT 键保存文件(尚未实现)
");
112     printf("按任意键开始画图。");
113     Max_X = 45;
114     Max_Y = 6;
115     getch();
116     InitScreen(hOutput);
117 }
118 
119 /**************清屏函数*****************/
120 void InitScreen(HANDLE hOutput)
121 {
122     int i,j;
123     GotoXy(hOutput, 0, 0);
124     for(j=0;j<=Max_Y;j++)
125     {
126         for(i=0;i<=Max_X;i++)
127             printf(" ");
128         printf("
");
129     }
130     Max_X = Max_Y = 0;
131 }
132 
133 void ReadFile(HANDLE hOutput)
134 {
135     FILE * fp;
136     char c;
137     GotoXy(hOutput,0,0);
138     fp=fopen("draw.txt","r");
139     fscanf(fp,"%c",&c);
140     printf("%c",c);
141 }
142 
143 void SaveFile(HANDLE hOutput)
144 {
145     FILE * fp;
146     char c;
147     int i,j;
148     GotoXy(hOutput,0,0);
149     fp=fopen("draw.txt","w");
150     
151     fclose(fp);
152 }