# 函数 -> 代码复用

# # 定义一个求和函数
# def calctotal(begin, end):
#     total = 0
#     for i in range(begin, end + 1):
#         total += i
#     print(total)
#
# # 调用函数
# calctotal(1, 100)
# calctotal(1, 1000)
# calctotal(1, 10000)


# def fuc1():
#     print("hello, world")
#
#
# fuc1()


# def fuc2(a, b):
#     return a + b
#
#
# print(fuc2(1.5, True))

# def point():
#     x = 10
#     y = 20
#     return x, y
#
#
# a, b = point()
# print(a, b)


# def point():
#     x = 10
#     y = 20
#     return x, y
#
#
# _, b = point()
# print(b)

x = 10


# def fuc3():
#     global x
#     x = 20
#
#
# fuc3()
# print(f"x = {x}")


# def fuc4():
#     for i in range(1, 11):
#         print(i)
# 
# 
# fuc4()

# cnt = 0
#
#
# def fuc5():
#     global cnt
#     cnt += 1
#     return cnt
#
#
# total = 0
# for i in range(0, 10):
#     total += fuc5()
# print(f"total = {total}")

# 递归
# def fuc5(i):
#     if i < 2:
#         return 1
#     return fuc5(i - 1) + fuc5(i - 2)
#
#
# ret = fuc5(3)
# print(f"ret = {ret}")


# 递归求阶乘
# def fuc6(n):
#     if n == 1:
#         return 1
#     return n * fuc6(n - 1)
#
#
# ret = fuc6(5)
# print(f"ret = {ret}")


def fuc7(x, y, flag = False):
    if flag:
        print(f"x = {x}, y = {y}")
    return x + y


ret = fuc7(2, 3, True)
print(f"ret = {ret}")