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// 定义一个交换两个变量的函数 func swapTwoInts(_ a: inout Int, _ b: inout Int) { let temporaryA = a a = b b = temporaryA } var numb1 = 100 var numb2 = 200 print("交换前数据: \(numb1) 和 \(numb2)") swapTwoInts(&numb1, &numb2) print("交换后数据: \(numb1) 和 \(numb2)")
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