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splitting a string and then converting

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Join Date: Jul 2007

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Reputation: FilteR is an unknown quantity at this point

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FilteR

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splitting a string and then converting

Aug 1st, 2007

When i type in a string consisting of numbers and signs for example:
12 + 3
how can i split it and how can i convert parts of the string into integers?
been searching in the web for 2 hours didnt find anything apropreate

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Join Date: Jul 2007

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CodeMonkey775 CodeMonkey775 is offline

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Re: splitting a string and then converting

Aug 1st, 2007

I'm not really sure what you are planning to do with it once you convert it, but this is how you would get the numbers out as integers. To actually evaluate the expression within C#, you would have to delve into CodeDom where you compile C# code during runtime.

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
            string expression = "12 + 3";
            char[] separators = new char[] { Convert.ToChar("+"), Convert.ToChar("-"), Convert.ToChar("*"), Convert.ToChar("/") };
 
            foreach (string number in expression.Split(separators))
            {
                int convert = Convert.ToInt32(number));
            }
            string expression = "12 + 3";
            char[] separators = new char[] { Convert.ToChar("+"), Convert.ToChar("-"), Convert.ToChar("*"), Convert.ToChar("/") };

            foreach (string number in expression.Split(separators))
            {
                int convert = Convert.ToInt32(number));
            }

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Join Date: Jul 2007

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tostrinj

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Re: splitting a string and then converting

Aug 1st, 2007

How about this:

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
string g = "12 + 3";
string[] MyInts = g.Split('+');
ArrayList RealInts = new ArrayList();
 
for(int i = 0; i < MyInts.Lenght; i++){
   RealInts.Add(Convert.ToInt32(((string)MyInts[i]).Trim());
}
string g = "12 + 3";
string[] MyInts = g.Split('+');
ArrayList RealInts = new ArrayList();

for(int i = 0; i < MyInts.Lenght; i++){
   RealInts.Add(Convert.ToInt32(((string)MyInts[i]).Trim());
}

At the end you should get an array list of integers.

RealInts[0] = 12;
RealInts[1] = 3;

If you want individual chars converted into ints then something like this should do it

 Help with Code Tags 
 C# Syntax (Toggle Plain Text) 
string g = "12 + 3";
 
char [] MyInts = g.ToCharArray();
ArrayList RealInts = new ArrayList();
 
Foreach(char c in MyInts){
  if(IsNumeric(c.ToString())){
    RealInts.Add(Convert.ToInt32(c));
  }
}
string g = "12 + 3";

char [] MyInts = g.ToCharArray();
ArrayList RealInts = new ArrayList();

Foreach(char c in MyInts){
  if(IsNumeric(c.ToString())){
    RealInts.Add(Convert.ToInt32(c));
  }
}

After this you should get something like this:

RealInts[0] = 1;
RealInts[1] = 2;
RealInts[2] = 3;

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Join Date: May 2007

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subburaj.r subburaj.r is offline

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Re: splitting a string and then converting

Aug 2nd, 2007

•

Originally Posted by FilteR

When i type in a string consisting of numbers and signs for example:
12 + 3
how can i split it and how can i convert parts of the string into integers?
been searching in the web for 2 hours didnt find anything apropreate

C#
====
string str_string = "12+3";
string[] str_arrstring = str_string.Split('+');
int s_first = Convert.ToInt32(str_arrstring[0]);
int s_second = Convert.ToInt32(str_arrstring[1]);