Data Type Conversion

[hisheeraz]

Hey can any one tell me please...

i input 4 digits in the input buffer... (1234) and read them as string

myString = Console.ReadLine();

then i wasnt to split those number into individual digits.

            int=input=0;char c;
            for (int i = 0; i < myString.Length; i++)
            {
                c = myString[i];
                input = Convert.ToInt32(c);
                Console.WriteLine(input);
            }

after the compilation of the program and user input i get this output

49
50
51
52

where as i think it should be something like

1
2
3
4

so my problem is that...Convert.ToInt32(c); is not converting...and i am not getting error as well.
and when i change this type conversion line of code to

input = Int32.Parse(c);

then i get the following error

Error	1	The best overloaded method match for 'int.Parse(string)' has some invalid arguments	D:\My .NET Work\C #\Console\Dietel C Sharp\Chapter 4\Exercise 4.15\Exercise 4.15\Program.cs	30	25	Exercise 4.15
Error	2	Argument '1': cannot convert from 'char' to 'string'	D:\My .NET Work\C #\Console\Dietel C Sharp\Chapter 4\Exercise 4.15\Exercise 4.15\Program.cs	30	37	Exercise 4.15

please help me solve this tiny problem...thank you.
RentedLips

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[toraj58]

the problem is that Int32.Parse() method only accepts String as its parameter. so you should convert Char to String before calling this method. Try the code below:

String myString = "1234";
 int input;
 char c;
            for (int i = 0; i < myString.Length; i++)
            {
                c = myString[i];
                String s = c.ToString();
                input = Int32.Parse(s);
                Console.WriteLine(input);
            }

you can also use Convert.ToInt32() method instead of Int32.Parse(). the output 49,50... which you got is the ASCII codes of characters 1,2...

Touraj Ebrahimi
toraj_e@yahoo.com

 

[toraj58]

i have an alternative solution for you but sneaky, try the code below:

string s = "1234";
int input;
    foreach (char c in s)
    {
     Console.WriteLine(c)
    }

you see that by the means of this solution you don't need conversion but be carefull if you want do arithmatic operation on c the output will vary and you should convert to int before it.

Touraj Ebrahimi
toraj_e@yahoo.com

 

[litton1]

so my problem is that...Convert.ToInt32(c); is not converting...

It is converting the Char to int but your problem is that a char of 1 has an asci value of 49. see the link below then look up Chr value till you find 1, move across to the decimal column (Dec) and you will see the value 49. Hence the reason that Parse takes a string (not every everyone knows that a char has an int value). BTW you should use Int.TryParse() (see code below)

int result = 0;
if (!Int32.TryParse(myString, out result))
{
  MessageBox.Show("Could Not Parse", "Error")
}
else 
{
  MessageBox.Show("My int value is " + result.ToString());
}

http://www.asciitable.com/

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