Testing code problem

[Chaosy]

hi, in my new school we got programming lessons and since I know basic jass the stuff they said on the first lessons I allready knew more or less. Like variables etc.

However we are supposed to learn C# and I got the "microsoft visual C# express " program to code in. However I dont get how to test my code. I just made simple test.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("afafkaf");
            Console.WriteLine("sdsa");
        }
    }
}

nothing happens when I try to test this, the cmd windows pops up for 0.1 seconds and then nothing. I get no errors from the program saying syntax error etc

 

[Xonok]

hi, in my new school we got programming lessons and since I know basic jass the stuff they said on the first lessons I allready knew more or less. Like variables etc.

However we are supposed to learn C# and I got the "microsoft visual C# express " program to code in. However I dont get how to test my code. I just made simple test.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("afafkaf");
            Console.WriteLine("sdsa");
        }
    }
}

nothing happens when I try to test this, the cmd windows pops up for 0.1 seconds and then nothing. I get no errors from the program saying syntax error etc

Make your window either wait some time or for user response. It kind of makes sense that a program closes once it finishes doing stuff.

 

[Chaosy]

as I get it the function/command is supposed to show the text inside that cmd that pops up. Atleast acording to a youtube video I saw.

 

[Dr Super Good]

Yes except the command window is closed when the program finishes execution which happens virtually instantly. You need to either run it from a command window (which will not close after execution) or you need to keep the main thread alive (get it to sleep forever). Additionally some IDEs will log all output somewhere, even if the program finishes execution. You could also run the program in debug mode with a break point just before the main thread ends.

 

[Ironside]

Here.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("afafkaf");
            Console.WriteLine("sdsa");
            Console.Read();
        }
    }
}

 

[Chaosy]

thanks it works now.

another question

for (int i = 0; i < 10; i++);

cant I short this down? This is taken from a random site I googled.

//I would like something like
int i = 0;
for (i < 10);

 

[Ironside]

The second one doesn't do what the first one does.
The first one can't be any shorter for the effect it returns.

 

[Chaosy]

that's sad. What is the i++ then?

nvm: I googled it. Thanks for the help, this is solved rep+

 

[eubz]

if you use for statement, you should always have 3 values. It cannot be shorten as this:

for (i<10){

}

for statement always follow this code:

for (i=0; i<10; i++){

}

which means that unless the value of i is less than 0 it will still increment.

 

[Dr Super Good]

"for(;" is valid in most languages. You do not need an initializer, a test condition or a next loop setup statement. Of course C# may require them, but I know C, C++ and Java do not.

 

[Chaosy]

I simply use while instead, look much more clean and its easier to use

int i = 0;
while (i > 10)
{
    //stuff
}

 

[Dr Super Good]

I simply use while instead, look much more clean and its easier to use

Except that loop never ends because the while condition is always true... No where are you incrementing i.

 

[Statharas]

When it comes to repeating actions in relation with the incremental value of a variable, always use for().

While should be used in cases such as waiting for something to stop.

Example, while(MySqlDataReader.Read()). Each time this function returns true, it means it has more thing to give you. That's how you grab stuff from a database.

 

[Adiktuz]

for integer-based loops, I find it easier to use "for"... I use "while" for non-integer-based loops...

 

[GhostWolf]

for (int i = 10; i--;) // For cases where order of iteration doesn't matter

 

[Dr Super Good]

That only works for languages which accept int as a logical value (C/C++ for example). In java it would throw a type error.

 

[GhostWolf]

It's a good thing this thread is not about Cra-- Java, then.

 

[-Kobas-]

It will throw error in C# as well.

Anyway take this example

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 0; i < 10; i++)
            {
                Console.Write(i + "\n"); 
            }
            Console.Write("\n"); 
            for (int i = 0, j = 9; i < 10; i++, j--)
            {
                Console.Write(i + " : " + j + "\n");
            }
            Console.Write("\n"); 
            for (int i = 0, j = 9; i < 10; )
            {
                    i++; 
                    j--;
                    Console.Write(i + " : " + j + "\n"); 
            }

            Console.Read();
        }
    }
}

For 1 ->
0
1
2
3
4
5
6
7
8
9

For 2 ->
0 9
1 8
2 7
3 6
4 5
5 4
6 3
7 2
8 1
9 0

For 3 ->
1 8
2 7
3 6
4 5
5 4
6 3
7 2
8 1
9 0
10 -1

Because in this 3rd case we first increase/reduce i/j and then write it, while in first 2 we do this after whole checking, you can use this analogy with while and do while loops.

 

[Kanadaj]

for integer-based loops, I find it easier to use "for"... I use "while" for non-integer-based loops...

I rarely use while, most of the time it's either for or foreach for me.

Also, to the OP, you can make your life easier in Visual Studio if you type in "for" (without the apostrophes, of course), and press TAB twice.