自定义函数:
def changfangxing(a,b):
s = a*b
return s
def sanjiaoxing(a,h):
s = (a*h)/2
return s
def yuan(r):
s = 3.14*r*r
return s
def chengfa(a,b):
j = a*b
return j
def chufa(a,b):
j = a/b
return j
def jiafa(a,b):
j = a+b
return j
def jianfa(a,b):
j = a-b
return j
def jiujiu():
for i in range(1,10):
for j in range(1,i+1):
print('%d*%d=%d' % (j,i,i*j),end='\t')
def chengfabiao():
return jiujiu()
import gongju
while True:
num = int(input('请输入数字选择工具:\n1长方形面积计算\n2三角形面积计算\n3圆形面积计算\n4九九乘法表\n5乘法计算\n6除法计算\n7加法计算\n8减法计算\n0退出\n'))
if num <0 or num> 9:
print()
print('请输入1-9之间的数字')
print()
l = input('按回车继续')
if not l:
continue
if num == 0:
print('退出')
break
if num == 1:
cfx = gongju.changfangxing(int(input('请输入长度:')),int(input('请输入宽度:')))
print('长方形面积为:%.2f' % cfx)
print()
l = input('按回车继续')
if not l:
continue
if num == 2:
sjx = gongju.sanjiaoxing(int(input('请输入底边长度:')),int(input('请输入高度:')))
print('三角形的面积为:%.2f' % sjx)
print()
l = input('按回车继续')
if not l:
continue
if num == 3:
y = gongju.yuan(int(input('请输入半径:')))
print('圆的面积为:%.2f' % y)
print()
l = input('按回车继续')
if not l:
continue
if num == 4:
cfb = gongju.chengfabiao()
print(cfb)
print()
l = input('按回车继续')
if not l:
continue
if num == 5:
cf = gongju.chengfa(int(input('请输入:')),int(input('请输入:')))
print('结果为:%d' % cf)
print()
l = input('按回车继续')
if not l:
continue
if num == 6:
chu = gongju.chufa(int(input('请输入被除数:')),int(input('请输入除数:')))
print('商为:%d' % chu)
print()
l = input('按回车继续')
if not l:
continue
if num == 7:
jia = gongju.jiafa(int(input('请输入数字:')),int(input('请输入数字:')))
print('和为:%d' % jia)
print()
l = input('按回车继续')
if not l:
continue
if num == 8:
jf = gongju.jianfa(int(input('请输入被减数:')),int(input('请输入减数:')))
print('差为:%d' % jf)
print()
l = input('按回车继续')
if not l:
continue
请帮我优化一下。如果能换一种思路写出来更好。谢谢