Complex I / O using Console.WriteLine ()
I am currently teaching myself C # after years of working in C ++ only. Needless to say, there was a lot that I needed to retrain. My question here is the following:
What's the best approach in a Windows Console application to print (write to the console window) complex information containing multiple variables, lines of text, and newlines?
Simply put, how would I translate something similar to the following C ++ code to C #:
int x = 1; int y = 2; double a = 5.4;
cout << "I have " << x << " item(s), and need you to give" << endl
<< "me " << y << " item(s). This will cost you " << a << endl
<< "units." << endl;
In C ++, this will output the following to the console:
I have 1 item (s) and you need to give
give me 2 item (s). It will cost you 5.4
units.
This example is completely arbitrary, but I often have short but complex messages like this in my programs. Do I have to completely retrain how I format the output, or are there similar features in C # that I haven't found yet (I've digged through a lot of Console.IO documentation).
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You can supply the seat holders on the line you write to the console, and then provide values to replace those seat holders, for example:
Console.WriteLine("I have {0} item(s), and need you to give\r\n" +
"me {1} item(s). This will cost you {2} \r\nunits.", x, y, a);
I think for readability, I would split it:
Console.WriteLine("I have {0} item(s), and need you to give", x);
Console.WriteLine("me {0} item(s). This will cost you {1} ", y, a);
Console.WriteLine("units.");
As BradleyDotNet pointed out, the method Console.WriteLine()
does not directly perform magic. It calls String.Format
, which in turn uses StringBuilder.AppendFormat
.
If you want to see what's going on inside you can check the source code here .
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