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using System; namespace CalculatorApplication { class NullablesAtShow { static void Main(string[] args) { int? num1 = null; int? num2 = 45; double? num3 = new double?(); double? num4 = 3.14157; bool? boolval = new bool?(); // 显示值 Console.WriteLine("显示可空类型的值: {0}, {1}, {2}, {3}", num1, num2, num3, num4); Console.WriteLine("一个可空的布尔值: {0}", boolval); Console.ReadLine(); } } }
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