}
============================================================== 【程序56】
题目:画图,学用circle画圆形。 1.程序分析: 2.程序源代码:
/*circle*/ #i nclude \main()
{int driver,mode,i;
float j=1,k=1;
driver=VGA;mode=VGAHI; initgraph(&driver,&mode,\setbkcolor(YELLOW); for(i=0;i<=25;i++) {
setcolor(8); circle(310,250,k); k=k+j; j=j+0.3; }
}
============================================================== 【程序57】
题目:画图,学用line画直线。 1.程序分析: 2.程序源代码: #i nclude \main()
{int driver,mode,i; float x0,y0,y1,x1; float j=12,k;
driver=VGA;mode=VGAHI; initgraph(&driver,&mode,\setbkcolor(GREEN);
x0=263;y0=263;y1=275;x1=275; for(i=0;i<=18;i++) {
setcolor(5); line(x0,y0,x0,y1); x0=x0-5; y0=y0-5; x1=x1+5; y1=y1+5; j=j+10; }
x0=263;y1=275;y0=263; for(i=0;i<=20;i++) {
setcolor(5);
line(x0,y0,x0,y1); x0=x0+5; y0=y0+5; y1=y1-5; } }
============================================================== 【程序58】
题目:画图,学用rectangle画方形。
1.程序分析:利用for循环控制100-999个数,每个数分解出个位,十位,百位。 2.程序源代码: #i nclude \main()
{int x0,y0,y1,x1,driver,mode,i; driver=VGA;mode=VGAHI; initgraph(&driver,&mode,\setbkcolor(YELLOW);
x0=263;y0=263;y1=275;x1=275; for(i=0;i<=18;i++) {
setcolor(1);
rectangle(x0,y0,x1,y1); x0=x0-5; y0=y0-5; x1=x1+5;
y1=y1+5; }
settextstyle(DEFAULT_FONT,HORIZ_DIR,2); outtextxy(150,40,\line(130,60,480,60); setcolor(2); circle(269,269,137); }
============================================================== 【程序59】
题目:画图,综合例子。 1.程序分析: 2.程序源代码: # define PAI 3.1415926 # define B 0.809 # include \#i nclude \main()
{
int i,j,k,x0,y0,x,y,driver,mode; float a;
driver=CGA;mode=CGAC0; initgraph(&driver,&mode,\setcolor(3);
setbkcolor(GREEN); x0=150;y0=100; circle(x0,y0,10); circle(x0,y0,20); circle(x0,y0,50); for(i=0;i<16;i++) {
a=(2*PAI/16)*i; x=ceil(x0+48*cos(a)); y=ceil(y0+48*sin(a)*B); setcolor(2); line(x0,y0,x,y);}
setcolor(3);circle(x0,y0,60);
/* Make 0 time normal size letters */ settextstyle(DEFAULT_FONT,HORIZ_DIR,0); outtextxy(10,170,\getch();
setfillstyle(HATCH_FILL,YELLOW); floodfill(202,100,WHITE); getch();
for(k=0;k<=500;k++) {
setcolor(3);
for(i=0;i<=16;i++) {
a=(2*PAI/16)*i+(2*PAI/180)*k; x=ceil(x0+48*cos(a));
y=ceil(y0+48+sin(a)*B); setcolor(2); line(x0,y0,x,y); }
for(j=1;j<=50;j++)
{
a=(2*PAI/16)*i+(2*PAI/180)*k-1; x=ceil(x0+48*cos(a)); y=ceil(y0+48*sin(a)*B); line(x0,y0,x,y); } }
restorecrtmode(); }
============================================================== 【程序60】
题目:画图,综合例子。 1.程序分析: 2.程序源代码: #i nclude \#define LEFT 0 #define TOP 0
#define RIGHT 639 #define BOTTOM 479 #define LINES 400
#define MAXCOLOR 15 main() {
int driver,mode,error; int x1,y1; int x2,y2;
int dx1,dy1,dx2,dy2,i=1; int count=0; int color=0; driver=VGA; mode=VGAHI;
initgraph(&driver,&mode,\x1=x2=y1=y2=10; dx1=dy1=2; dx2=dy2=3; while(!kbhit()) {
line(x1,y1,x2,y2); x1+=dx1;y1+=dy1; x2+=dx2;y2+dy2;
if(x1<=LEFT||x1>=RIGHT) dx1=-dx1;
if(y1<=TOP||y1>=BOTTOM) dy1=-dy1;
if(x2<=LEFT||x2>=RIGHT)
dx2=-dx2;
if(y2<=TOP||y2>=BOTTOM) dy2=-dy2;
if(++count>LINES)
{
setcolor(color);
color=(color>=MAXCOLOR)?0:++color; } }
closegraph(); }
【程序61】
题目:打印出杨辉三角形(要求打印出10行如下图) 1.程序分析: 1
1 1 1 2 1 1 3 3 1
1 4 6 4 1
1 5 10 10 5 1 2.程序源代码: main() {int i,j;
int a[10][10];
printf(\for(i=0;i<10;i++) {a[i][0]=1; a[i][i]=1;} for(i=2;i<10;i++) for(j=1;j
a[i][j]=a[i-1][j-1]+a[i-1][j]; for(i=0;i<10;i++) {for(j=0;j<=i;j++) printf(\ printf(\ } }
============================================================== 【程序62】
题目:学习putpixel画点。
1.程序分析: 2.程序源代码: #i nclude \#i nclude \main() {
int i,j,driver=VGA,mode=VGAHI; initgraph(&driver,&mode,\setbkcolor(YELLOW); for(i=50;i<=230;i+=20) for(j=50;j<=230;j++) putpixel(i,j,1); for(j=50;j<=230;j+=20) for(i=50;i<=230;i++) putpixel(i,j,1);
}
============================================================== 【程序63】
题目:画椭圆ellipse 1.程序分析: 2.程序源代码: #i nclude \#i nclude \#i nclude \main() {
int x=360,y=160,driver=VGA,mode=VGAHI; int num=20,i; int top,bottom;
initgraph(&driver,&mode,\