1.程序分析：~0=1; ~1=0; 2.程序源代码：
如何查看复数的16进制数 '''
if __name__ == '__main__': a = 234 b = ~a
print 'The a\\'s 1 complement is %d' % b a = ~a
print 'The a\\'s 2 complement is %d' % a '''
【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 \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() '''
【程序57】
题目：画图，学用line画直线。
1.程序分析： 2.程序源代码： '''
if __name__ == '__main__': from Tkinter import *
canvas = Canvas(width=300, height=300, bg='green') canvas.pack(expand=YES, fill=BOTH) x0 = 263 y0 = 263 y1 = 275 x1 = 275
for i in range(19):
canvas.create_line(x0,y0,x0,y1, width=1, fill='red') x0 = x0 - 5 y0 = y0 - 5 x1 = x1 + 5 y1 = y1 + 5
x0 = 263 y1 = 275 y0 = 263
for i in range(21):
canvas.create_line(x0,y0,x0,y1,fill = 'red') x0 += 5 y0 += 5 y1 += 5
mainloop() '''
【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： '''
if __name__ == '__main__': from Tkinter import * root = Tk()
root.title('Canvas')
canvas = Canvas(root,width = 400,height = 400,bg = 'yellow') x0 = 263 y0 = 263 y1 = 275 x1 = 275
for i in range(19):
canvas.create_rectangle(x0,y0,x1,y1) x0 -= 5 y0 -= 5 x1 += 5 y1 += 5
canvas.pack() root.mainloop() '''
题目：画图，综合例子。 1.程序分析： 2.程序源代码： '''
if __name__ == '__main__': from Tkinter import *
canvas = Canvas(width = 300,height = 300,bg = 'green') canvas.pack(expand = YES,fill = BOTH) x0 = 150 y0 = 100
canvas.create_oval(x0 - 10,y0 - 10,x0 + 10,y0 + 10) canvas.create_oval(x0 - 20,y0 - 20,x0 + 20,y0 + 20) canvas.create_oval(x0 - 50,y0 - 50,x0 + 50,y0 + 50) import math B = 0.809
for i in range(16):
a = 2 * math.pi / 16 * i
x = math.ceil(x0 + 48 * math.cos(a)) y = math.ceil(y0 + 48 * math.sin(a) * B) canvas.create_line(x0,y0,x,y,fill = 'red')
canvas.create_oval(x0 - 60,y0 - 60,x0 + 60,y0 + 60)
for k in range(501): for i in range(17):
a = (2 * math.pi / 16) * i + (2 * math.pi / 180) * k x = math.ceil(x0 + 48 * math.cos(a)) y = math.ceil(y0 + 48 + math.sin(a) * B) canvas.create_line(x0,y0,x,y,fill = 'red')
for j in range(51):
a = (2 * math.pi / 16) * i + (2* math.pi / 180) * k - 1 x = math.ceil(x0 + 48 * math.cos(a)) y = math.ceil(y0 + 48 * math.sin(a) * B) canvas.create_line(x0,y0,x,y,fill = 'red') mainloop() '''
【程序60】
题目：画图，综合例子。 1.程序分析： 2.程序源代码：
键盘不知道如何响应，先不写这个 #include \#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： '''
if __name__ == '__main__': a = []
for i in range(10): a.append([]) for j in range(10): a[i].append(0) for i in range(10): a[i][0] = 1 a[i][i] = 1
for i in range(2,10): for j in range(1,i):
a[i][j] = a[i - 1][j-1] + a[i - 1][j] from sys import stdout for i in range(10):
for j in range(i + 1):
stdout.write(a[i][j]) stdout.write(' ') print '''
【程序62】
题目：学习putpixel画点。
1.程序分析： 2.程序源代码： #include \#include \main()