如何實現C語言畫圖教程

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C語言有豐富的數據結構和運算符。包含了各種數據結構,如整型、數組類型、指針類型和聯合類型等,用來實現各種數據結構的.運算。以下是小編為大家搜索整理的C語言如何實現畫圖教程,希望能給大家帶來幫助!更多精彩內容請及時關注我們考試網!

如何實現C語言畫圖教程

程序中定義了幾個特殊鍵:

"V”:畫筆提起

"W”:開始畫圖

"R”:開始擦圖

"S”:當前圖形存入文件

"E”:調出已有文件

"C”:畫圓

程序一運行,屏幕上出現一個黃色的邊框來設定畫圖的區域,區域中間出現提起的畫筆符號 ,當按下”W“鍵時,畫筆符號變為 ,此時可移動方向鍵(上、下、左、右、左上、左下、右上、右下)來畫圖;當按下”R“鍵時,畫筆符號變為 ,此時可移動方向鍵來擦圖;在畫圖過程中,按下“C”鍵,可畫出一個半徑為20個象素點的圓;當結束畫圖時,按下“S”鍵,將畫好的圖形存盤;按下“E”鍵可調出已有的圖形進行編輯。

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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