Storing values from Edit Box into an array

Hello I am a beginner in programming. Can anyone give me an idea on how to do this?

I will be using an edit box to input space-separated numerical values. Then the input values will then be stored in an array of type double.

For example:
Input values to the edit box are: 1.1 2.2 3.3

Input values will be stored in the array in the following manner:
arrayNum[0] = 1.1
arrayNum[1] = 2.2
arrayNum[2] = 3.3

Thanks.

Have you tried?
Can you show us an example?

Here is my code. There is no error when I compile it but when I run it the program fails. Can somebody help? Thanks.

Code:

---

void CCStringParserDlg::OnOK()
{
        // TODO: Add extra validation here

UpdateData(TRUE);

int i,j = 0;
int startIndex = 0;
int endIndex = 0;
int charCount = 0;
double Values[4];
CString strValues[4];

// Loop to parse values from m_sValues CString variable and store to string array
do
{
        // Find position of space character in string contained in m_sValues CString variable
        endIndex = m_sValues.Find(' ',startIndex);
        charCount = endIndex - startIndex;
        // Store captured value to array element of type string
        strValues[i] = m_sValues.Mid(startIndex,charCount);
        startIndex = endIndex + 1;
        i++;
}
while (endIndex != -1);

        // Store string array to double array
        for (j = 0; j = 3; j++)
        {
                Values[j] = strtod(strValues[j],NULL);
        }

        // Display message containing first captured value
        MessageBox(strValues[0]);

        CDialog::OnOK();
}

---

Code:

---

for (j = 0; j = 3; j++)

---

And what's this supposed to do, I wonder?

I dont know if I get your question right but it basically the condition to terminate the for loop. It is 3 because the array has a maximum index value of 3.

Indeed, but the for-loop condition loops while the condition is true (NOT until the condition is true).
And do you know the difference between "=" and "=="?

I tried changing that part of code but still the program fails. The following contains my changes. So basically what I am trying to do in the code is to first parse and store the values in a string array using the do-while loop and then copy the values from the string array to the double array using the for loop.

Code:

---


if (endIndex = -1)
{
        // Store string array to double array
        for (j = 0; j == 3; j++)
        {
                Values[j] = strtod(strValues[j],NULL);
        }

        // Display message containing first captured value
        MessageBox(strValues[0]);
}

---

Well, as I said, the condition is keep looping if true.
Since j is initialized to 0 first, 0 != 3 and thus the condition is false and the loop will never execute.
The for loop executes while the expression is true.

Now I get what your are trying to say. I already corrected my code. However my program still fails. I think what causes the failure is in the do-while part. I just can't figure out what it is.

Code:

---

if (endIndex = -1)
{
        // Store string array to double array
        for (j = 0; j < 4; j++)
        {
                Values[j] = strtod(strValues[j],NULL);
        }

        // Display message containing first captured value
        MessageBox(strValues[0]);
}

---

Another suggestion: Seeing asthe input is dynamic (not fixed), you could get a potential buffer overflow.
Therefore, I do suggest you use std::vector. Ie:

Code:

---

std::vector<double> Values;
std::vector<CString> strValues;

---

Then use .push_back() to store your values and use .size() to query the size later in your loops.
Also, what output DO you get?

I was already able to fix it doing some changes. Here is the working code for parsing four numerical values in a CString variable separated by spaces. Thanks.

Code:

---

        int i = 0;
        int j = 0;
        int startIndex = 0;
        int endIndex = 0;
        int charCount = 0;
        double dValues[4];
        CString strValues[4];

        // Loop to parse values from m_sValues CString variable and store to string array
        for (i=0;i< 4; i++)
        {
                // Find position of space character in string contained in m_sValues CString variable
                endIndex = m_sValues.Find(' ',startIndex);
                        if (endIndex == -1)
                        {
                                // Store the last value to string array
                                charCount = m_sValues.GetLength() - startIndex;
                                strValues[i] = m_sValues.Right(charCount);
                                break;
                        }
                charCount = endIndex - startIndex;
                // Store captured value to array element of type string
                strValues[i] = m_sValues.Mid(startIndex,charCount);
                startIndex = endIndex + 1;
        }


               
        // Store values from string array to double array
        for (j = 0; j < 4; j++)
        {
                dValues[j] = strtod(strValues[j],NULL);
        }

---