*1-1.c*/
#
![](/icons/476include.gif)
![](/icons/476main.gif)
{
![](/icons/476int.gif)
detectgraph(&gdriver, &gmode); /*自动测试硬件*/
pr
![](/icons/476int.gif)
getch
![](/icons/476kh.gif)
initgraph(&gdriver, &gmode, \"\"); /* 根据测试结果
![](/icons/476chushi.gif)
circle(320,240,50);
circle(320,240,80);
circle(320,240,110);
getch
![](/icons/476kh.gif)
closegraph
![](/icons/476kh.gif)
} /*1-2.c*/
#
![](/icons/476include.gif)
![](/icons/476main.gif)
![](/icons/476kh.gif)
{
![](/icons/476int.gif)
initgraph(&gdriver, &gmode, \"\");
circle(320,240,50);
circle(320,240,80);
circle(320,240,110);
getch
![](/icons/476kh.gif)
closegraph
![](/icons/476kh.gif)
}
/*1-3.c*/
#
![](/icons/476include.gif)
#
![](/icons/476include.gif)
![](/icons/476main.gif)
![](/icons/476kh.gif)
{
![](/icons/476int.gif)
gdriver=DETECT;
initgraph(&gdriver, &gmode, \"\"); /*图形
![](/icons/476chushi.gif)
![](/icons/476set.gif)
cleardevice
![](/icons/476kh.gif)
for(i=0; i<=15; i
![](/icons/476jiajia.gif)
{
![](/icons/476set.gif)
circle(319, 239, 20+i*15); /*画半径区别
![](/icons/476de.gif)
delay(3000); /*延迟3000毫秒*/
}
for(i=0; i<=15; i
![](/icons/476jiajia.gif)
{
![](/icons/476set.gif)
cleardevice
![](/icons/476kh.gif)
for(j=0; j<=15;j
![](/icons/476jiajia.gif)
{
![](/icons/476set.gif)
circle(319, 239, 20+j*15); /*画半径区别
![](/icons/476de.gif)
delay(3000);
}
}
getch
![](/icons/476kh.gif)
closegraph
![](/icons/476kh.gif)
}
/*1-4.c*/
#
![](/icons/476include.gif)
#
![](/icons/476include.gif)
![](/icons/476main.gif)
![](/icons/476kh.gif)
{
![](/icons/476int.gif)
initgraph(&gdriver, &gmode, \"\");
![](/icons/476set.gif)
cleardevice
![](/icons/476kh.gif)
![](/icons/476set.gif)
circle(320,240,50);
circle(320,240,100);
![](/icons/476set.gif)
![](/icons/476set.gif)
rectangle(220, 140, 420, 340);
![](/icons/476set.gif)
![](/icons/476set.gif)
![](/icons/476yi.gif)
line(220, 240, 420, 240);
line(320, 140, 320, 340);
getch
![](/icons/476kh.gif)
closegraph
![](/icons/476kh.gif)
}
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