#include <conio.h>
#include <math.h>
#include <stdio.h>
#define PI 3.1415926
int s_x1=150,s_y1=150,s_x2=150,s_y2=250,s_x3=250,s_y3=250,s_x4=250,s_y4=150;
int s_centerx=200,s_centery=200;
int t_x1=200,t_y1=150,t_x2=245,t_y2=245,t_x3=155,t_y3=245;
int t_centerx=200,t_centery=210;
int f_centerx=150,f_centery=250,f_sa=60,f_ea=120,radius=50;
int f_x1=125,f_y1=207,f_x2=175,f_y2=207;
void drawSquare()
{
line(s_x1,s_y1,s_x2,s_y2);
line(s_x2,s_y2,s_x3,s_y3);
line(s_x3,s_y3,s_x4,s_y4);
line(s_x4,s_y4,s_x1,s_y1);
}
void drawTriangle()
{
line(t_x1,t_y1,t_x2,t_y2);
line(t_x2,t_y2,t_x3,t_y3);
line(t_x3,t_y3,t_x1,t_y1);
}
void drawFan()
{
arc(f_centerx,f_centery,f_sa,f_ea,radius);
line(f_x1,f_y1,f_centerx,f_centery);
line(f_x2,f_y2,f_centerx,f_centery);
}
void convert(int *x,int *y,int xc,int yc,double _angle)
{
int xt=*x,yt=*y;
*x=(int)(xc+(xt-xc)*cos(_angle)-(yt-yc)*sin(_angle));
*y=(int)(yc+(yt-yc)*cos(_angle)+(xt-xc)*sin(_angle));
}
void rotate(int angle,int choice)
{
double _angle=angle*PI/180;
if(choice==1)
{
convert(&s_x1,&s_y1,s_centerx,s_centery,_angle);
convert(&s_x2,&s_y2,s_centerx,s_centery,_angle);
convert(&s_x3,&s_y3,s_centerx,s_centery,_angle);
convert(&s_x4,&s_y4,s_centerx,s_centery,_angle);
}
else
{
if (choice==2)
{
convert(&t_x1,&t_y1,t_centerx,t_centery,_angle);
convert(&t_x2,&t_y2,t_centerx,t_centery,_angle);
convert(&t_x3,&t_y3,t_centerx,t_centery,_angle);
}
else
{
convert(&f_x1,&f_y1,f_centerx,f_centery,_angle);
convert(&f_x2,&f_y2,f_centerx,f_centery,_angle);
f_sa-=angle,f_ea-=angle;
}
}
}
int main()
{
int graphdriver = DETECT, graphmode;
int choice,angle;
initgraph(&graphdriver, &graphmode, "..\\bgi");
printf("*******************\n");
printf("1 draw square\n");
printf("2 draw triangle\n");
printf("3 draw fan\n");
printf("4 exit\n");
printf("*******************\n");
printf("please input a number to select your operation\n");
scanf("%d",&choice);
switch (choice)
{
case 1:drawSquare();break;
case 2:drawTriangle();break;
case 3:drawFan();break;
default: {closegraph();return 0;}
}
printf("please input a number(between 0 and 360) to rotate\n");
scanf("%d",&angle);
rotate(angle,choice);
switch (choice)
{
case 1:drawSquare();break;
case 2:drawTriangle();break;
case 3:drawFan();break;
}
getch();
return 0;
}
程序如上，我已經運行過了，可以運行，有問題我可以傳給妳源文件，和上面的也是壹樣。