Question

求C#高手解答一下，这里到底是哪里出现问题

static void Main(string[] args)
{
double firstnumber,secondnumber;
string username;
Console.WriteLine("enter your name:");
username = Console.readline();
Console.Writeline("welcome {0}!", username);
Console.WriteLine("now give me a number:");
firstnumber =Convert.ToDouble (console.readline());
Console.WriteLine("now give another number:");
secondnumber =Convert .ToDouble (Console.ReadLine());
Console.Writeline("the sum of {0})and (1) is (2).",firstnumber,secondnumber ,firstnumber + secondnumber);
Console.WriteLine ("the result of subtracing{0} from {1} is {2}.",secondnumber ,firstnumber ,firstnumber - secondnumber);
Console.WriteLine ("the product of {0} and {1} is {2}.",firstnumber,secondnumber,firstnumber * secondnumber);
Console.WriteLine("the result of dividing {0} by {1} is {2}.",firstnumber ,secondnumber ,firstnumber / secondnumber );
Console.WriteLine("the remainder after dividing {0} by {1} is {2}.", firstnumber , secondnumber ,firstnumber % secondnumber );
Console.readkey();
}

Answer 1

大小写搞错了，还有一处本来应该用花括号，你用了小括号
这是我改过的
static void Main(string[] args)
{
double firstnumber, secondnumber;
string username;
Console.WriteLine("enter your name:");
username = Console.ReadLine();
Console.WriteLine("welcome {0}!", username);
Console.WriteLine("now give me a number:");
firstnumber = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("now give another number:");
secondnumber = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("the sum of {0} and {1} is {2}.", firstnumber, secondnumber, firstnumber + secondnumber);
Console.WriteLine("the result of subtracing{0} from {1} is {2}.", secondnumber, firstnumber, firstnumber - secondnumber);
Console.WriteLine("the product of {0} and {1} is {2}.", firstnumber, secondnumber, firstnumber * secondnumber);
Console.WriteLine("the result of dividing {0} by {1} is {2}.", firstnumber, secondnumber, firstnumber / secondnumber);
Console.WriteLine("the remainder after dividing {0} by {1} is {2}.", firstnumber, secondnumber, firstnumber % secondnumber);
Console.ReadKey();
}

Answer 2

你这个地方写错了，你用的是(1),(2)，应该是{1},{2},如图所示。

Answer 3

异常代码发出来看下！
你这代码看的眼花！没心情帮你仔细看！

Answer 4

抛什么异常

Answer 5

000