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C語言

如何實(shí)現(xiàn)C語言畫圖教程

時(shí)間:2024-08-08 23:17:51 C語言 我要投稿
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如何實(shí)現(xiàn)C語言畫圖教程

  C語言有豐富的數(shù)據(jù)結(jié)構(gòu)和運(yùn)算符。包含了各種數(shù)據(jù)結(jié)構(gòu),如整型、數(shù)組類型、指針類型和聯(lián)合類型等,用來實(shí)現(xiàn)各種數(shù)據(jù)結(jié)構(gòu)的運(yùn)算。以下是小編為大家搜索整理的C語言如何實(shí)現(xiàn)畫圖教程,希望能給大家?guī)韼椭?更多精彩內(nèi)容請(qǐng)及時(shí)關(guān)注我們考試網(wǎng)!

  程序中定義了幾個(gè)特殊鍵:

  "V”:畫筆提起

  "W”:開始畫圖

  "R”:開始擦圖

  "S”:當(dāng)前圖形存入文件

  "E”:調(diào)出已有文件

  "C”:畫圓

  程序一運(yùn)行,屏幕上出現(xiàn)一個(gè)黃色的邊框來設(shè)定畫圖的區(qū)域,區(qū)域中間出現(xiàn)提起的畫筆符號(hào) ,當(dāng)按下”W“鍵時(shí),畫筆符號(hào)變?yōu)?,此時(shí)可移動(dòng)方向鍵(上、下、左、右、左上、左下、右上、右下)來畫圖;當(dāng)按下”R“鍵時(shí),畫筆符號(hào)變?yōu)?,此時(shí)可移動(dòng)方向鍵來擦圖;在畫圖過程中,按下“C”鍵,可畫出一個(gè)半徑為20個(gè)象素點(diǎn)的圓;當(dāng)結(jié)束畫圖時(shí),按下“S”鍵,將畫好的圖形存盤;按下“E”鍵可調(diào)出已有的圖形進(jìn)行編輯。

  3.源程序清單

  # include "graphics.h"

  # include "stdio.h"

  # include "fcntl.h"

  # include "stdlib.h"

  main()

  void save(),load();

  void *wg,*rg,*vg,*fy;

  int driver,mode;

  int c=RED;

  int x=320,y=225;

  int x1,y1,x2,y2;

  int k,k1,k2;

  /* initialize grapher */

  detectgraph(&driver,&mode);

  initgraph(&driver,&mode,"c: c");

  /* write the pen */

  bar(200,10,206,16);

  line(203,7,200,10);

  line(203,7,206,10);

  line(243,7,240,16);

  line(243,7,246,16);

  line(283,7,280,10);

  line(283,7,286,10);

  line(283,7,283,16);

  /* save the pen */

  wg=malloc(imagesize(200,7,206,16));

  rg=malloc(imagesize(240,7,246,16));

  vg=malloc(imagesize(280,7,286,16));

  fy=malloc(imagesize(200,7,206,16));

  getimage(200,7,206,16,wg);

  getimage(240,7,246,16,rg);

  getimage(280,7,286,16,vg);

  cleardevice();

  /* write the box */

  setcolor(YELLOW);

  rectangle(4,19,637,447);

  x1=x-3;

  y1=y+1;

  x2=x+3;

  y2=y+10;

  getimage(x1,y1,x2,y2,fy);

  putimage(x1,y1,vg,XOR_PUT);

  /* receive the command */

  for (;;)

  while (bioskey(1)==0);

  k=bioskey(0);

  putimage(x1,y1,fy,AND_PUT);

  if (((k&0x00ff)|0x00)==0)

  k1=k&0xff?0:k>>8; /* k1 is the specialkey value */

  else

  k2=k&0x00ff; /* k2 is the non-specialkey value */

  if (((k&0x00ff)|0x00)==0) /* Special key */

  switch(k1)

  case 45:

  restorecrtmode();

  exit(0);

  case 72:

  if (y>20)

  y=y-1;

  break;

  case 75:

  if (x>5)

  x=x-1;

  break;

  case 77:

  if (x<636)

  x=x+1;

  break;

  case 80:

  if (y<446)

  y=y+1;

  break;

  case 71:

  if ((x>5)&&(y>20))

  x=x-1;

  y=y-1;

  break;

  case 79:

  if ((x>5)&&(y<446))

  x=x-1;

  y=y+1;

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