两个数值交换

# 两个数交换
# 方法一,使用中间变量
a = 5
b = 8
temp = a
a = b
b = temp
print(a,b)

# 方法二，一行代码搞定
a = 5
b = 8
a,b = b,a
print(a,b)

# 错误的算法
a = 5
b = 8
a = b
b = a
print(a,b)