let point = (8,0)
switch point{
case (0,0):
print("It's oringin.")
fallthrough
case (_,0):
print("It's on the x-axis.")
fallthrough
case (0,_):
print("It's on the y-axis.")
default:
()
}
输出：
It's on the x-axis.
It's on the y-axis.
不对啊 ，斯坦福老头讲的Calculator里一大堆赋值语句做条件的，比如：
let op1Evaluation = evaluate(remainingOps)
if let operand1 = op1Evaluation.result {
let op2Evaluation = evaluate(op1Evaluation.remainingOps)
