在 C# 中将 String 转换为 int

问题描述

我正在尝试编写一个简单的程序，要求用户输入一个数字，然后我将使用该数字来决定给定年龄的门票费用.尝试将字符串转换为 int 时遇到问题.否则程序布局很好.有什么建议?谢谢

I am trying to write a simple program that asks the user to enter a number and then I will use that number to decide what the cost of the ticket will be for their given age. I am having trouble when trying to convert the string to int. Otherwise the program layout is fine. Any suggestions? thanks

using System;

class ticketPrice
{    
    public static void Main(String[] args)
    {
        Console.WriteLine("Please Enter Your Age");
        int input = Console.ReadLine();
        if (input < 5)
        {
            Console.WriteLine("You are "+input+" and the admisson is FREE!");
        }
        else if (input > 4 & input < 18)
        {
            Console.WriteLine("You are "+input+" and the admission is $5");
        }
        else if (input > 17 & input < 56)
        {
            Console.WriteLine("You are "+input+" and the admission is $10");
        }
        else if (input > 55)
        {
            Console.WriteLine("You are "+input+" and the admission is $8");
        }
    }
}

推荐答案

试试 int.TryParse(...) 方法.它不会抛出异常.

Try the int.TryParse(...) method. It doesn't throw an exception.

http://msdn.microsoft.com/en-us/library/f02979c7.aspx

此外，您应该在您的条件中使用 && 而不是 &.&& 是逻辑与，& 是按位与.

Also, you should use && not & in your conditions. && is logical AND and & is bitwise AND.

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