1
let somePoint = (1, 1)
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switch somePoint {
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case (0, 0):
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    print("\(somePoint) is at the origin")
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case (_, 0):
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    print("\(somePoint) is on the x-axis")
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case (0, _):
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    print("\(somePoint) is on the y-axis")
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case (-2...2, -2...2):
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    print("\(somePoint) is inside the box")
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default:
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    print("\(somePoint) is outside of the box")
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}
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// 输出“(1, 1) is inside the box”