下面的代码不会崩溃,但我不能推断为什么,给定“有限”的文档可用。 func foo(inout a: [Int], inout b: Int) {
a = []
b = 99
}
var arr = [1,2,3]
// confusion: where does the "out" of b go to?
// storage for a was already
我一直听到这个错误,说无效的语法,我真的迷路了,不知道为什么! def calculator():
def add(x, y):
return x + y
def subtract(x, y):
return x - y
def multiply(x, y):
return x * y
def devide(x, y):
return x/