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Aug 1st, 2007

splitting a string and then converting

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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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FilteR

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Aug 1st, 2007

Re: splitting a string and then converting

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.

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));
            }

CodeMonkey775

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Aug 1st, 2007

Re: splitting a string and then converting

How about this:

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

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;

tostrinj

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Aug 2nd, 2007

Re: splitting a string and then converting

Click to Expand / Collapse Quote 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]);

subburaj.r

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since May 2007

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