c#枚举数字转枚举_C＃枚举能力问题和解答套装4

c#枚举数字转枚举

1) What is the correct output of given code snippets in C#.NET?

using System;
class program
{
enum emp_salary : int
{
emp1 = 10000,
emp2 = 15000,
emp4 = 20000
}
static void Main(string[] args)
{
int sal = (int)emp_salary.emp2;
Console.WriteLine(sal);
}
}

10000
15000
Syntax error
Runtime exception

Answer & Explanation

Correct answer: 2
15000

The above code will print "15000" on console screen.

1)C＃.NET中给定代码段的正确输出是什么？

10000
15000
语法错误
运行时异常

答案与解释

正确答案：2
15000

上面的代码将在控制台屏幕上打印“ 15000” 。

2) What is the correct output of given code snippets in C#.NET?

using System;
class program
{
enum emp_salary : byte
{
emp1 = 10000,
emp2 = 15000,
emp4 = 20000
}
static void Main(string[] args)
{
int sal = (int)emp_salary.emp2;
Console.WriteLine(sal);
}
}

10000
15000
Syntax error
Runtime exception

Answer & Explanation

Correct answer: 3
Syntax error

The above code will generate syntax error because the value of enums is outside the range of byte.

2)C＃.NET中给定代码段的正确输出是什么？

10000
15000
语法错误
运行时异常

答案与解释

正确答案：3
语法错误

上面的代码将产生语法错误，因为enums的值超出了字节范围。

3) What is the correct output of given code snippets in C#.NET?

using System;
class program
{
enum emp_salary : float
{
emp1 = 10000,
emp2 = 15000,
emp4 = 20000
}
static void Main(string[] args)
{
int sal = (int)emp_salary.emp2;
Console.WriteLine(sal);
}
}

10000
15000
Syntax error
Runtime exception

Answer & Explanation

Correct answer: 3
Syntax error

The above code will generate syntax error because we cannot use a float with enum like this.

3)C＃.NET中给定代码段的正确输出是什么？

10000
15000
语法错误
运行时异常

答案与解释

正确答案：3
语法错误

上面的代码将产生语法错误，因为我们不能像这样使用带枚举的浮点数。

4) What is the correct output of given code snippets in C#.NET?

using System;
class program
{
enum emp_salary : int
{
emp1 = 10000,
emp2 = 15000,
emp4 = 20000
}
static void Main(string[] args)
{
emp_salary sal = emp_salary.emp2;
if (sal == emp_salary.emp2)
{
Console.WriteLine("15000");
}
}
}

10000
15000
Syntax error
Runtime exception

Answer & Explanation

Correct answer: 3
15000

The above code will print "15000" on the console screen.

4)C＃.NET中给定代码段的正确输出是什么？

10000
15000
语法错误
运行时异常

答案与解释

正确答案：3
15000

上面的代码将在控制台屏幕上打印“ 15000” 。

5) What is the correct output of given code snippets in C#.NET?

using System;
class program
{
int A = 10000;
int B = 15000;
int C = 20000;
enum emp_salary : int
{
emp1 = A,
emp2 = B,
emp4 = C
}
static void Main(string[] args)
{
emp_salary sal = emp_salary.emp2;
if (sal == emp_salary.emp2)
{
Console.WriteLine("15000");
}
}
}