【程序56】--画图，学用circle画圆形

# -*- coding: UTF-8 -*-
'''
【程序56】
题目：画图，学用circle画圆形。　　　
1.程序分析：
2.程序源代码：
#include "graphics.h"
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;
}
}


'''
if __name__ == '__main__':
    from Tkinter import *


    canvas = Canvas(width=800, height=600, bg='yellow')  
    canvas.pack(expand=YES, fill=BOTH)                
    k = 1
    j = 1
    for i in range(0,26):
        canvas.create_oval(310 - k,250 - k,310 + k,250 + k, width=1)
        k += j
        j += 0.3


    mainloop()