upperbounds issue with c++ from a csv file

i have the Following vb.net 2008 routine i am trying to get c++ to have the same functionality having alot of issues with c++ conversion, any help with this would be great...

Code:

---

Public Sub New()
        Try
            If ORIHoles Is Nothing Then
                ReDim ORIHoles(49)
                Dim ff As Integer = FreeFile()
                Dim tempstr As String
                Dim atempstr() As String
                FileOpen(ff, "postable.csv", OpenMode.Input, OpenAccess.Read, OpenShare.Shared)
                Do While Not EOF(ff)
                    tempstr = LineInput(ff)
                    atempstr = tempstr.Split(",")
                    If atempstr.GetUpperBound(0) = 2 Then
                        ORIHoles(CInt(atempstr(0))).Angle = CDbl(atempstr(1))
                        ORIHoles(CInt(atempstr(0))).Hypot = CDbl(atempstr(2))
                    End If
                Loop
                FileClose(ff)
            End If
        Catch ex As Exception
            GeneralErrorHandler(ex.ToString)
        End Try
        End Sub

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I don't know VB but it looks like you are trying to open a file, read a csv line, parse it into 3 values, store values 1 & 2 into a container indexed on value 0 and repeat for all lines in the file? This is fairly easy in C++ if this is what you want.

What is your C++ attempt? Can you post a sample input file?

Quote:

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Originally Posted by 2kaud

I don't know VB but it looks like you are trying to open a file, read a csv line, parse it into 3 values, store values 1 & 2 into a container indexed on value 0 and repeat for all lines in the file? This is fairly easy in C++ if this is what you want.

What is your C++ attempt? Can you post a sample input file?

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so the CSV looks like this 48 Values ,,,

01,-0.84415,0.35416
02,-0.64350,0.29412
03,-0.35877,0.25129
04,0.00000,0.23529
05,0.35877,0.25129
06,0.64350,0.29412
07,0.84415,0.35416
08,-0.68573,0.41802
09,-0.49935,0.36853
10,-0.26625,0.33535
11,0.00000,0.32353
12,0.26625,0.33535
13,0.49935,0.36853
14,0.68573,0.41802
15,-0.57134,0.48951
16,-0.40489,0.44799
17,-0.21109,0.42111
18,0.00000,0.41176
19,0.21109,0.42111
20,0.40489,0.44799

so what i am trying is to replicate the same functionality in c++ in Linux ,

so i have found, this snippet, i could hand code all 48 values in this mp.insert({ -0.84415,0.35416 }); this would be for 1
is there a workaround to this in C++ for linux g++ can we use the map ??

Code:

---

int main()
{
    // initialize container
    map<int, int> mp;

    // insert elements in random order
    mp.insert({ 12, 30 });
    mp.insert({ 11, 10 });
    mp.insert({ 15, 50 });
    mp.insert({ 14, 40 });

    // when 11 is present
    auto it = mp.upper_bound(11);

    cout << "The upper bound of key 11 is ";
    cout << (*it).first << " " << (*it).second << endl;

    // when 13 is not present
    it = mp.upper_bound(13);

    cout << "The upper bound of key 13 is ";
    cout << (*it).first << " " << (*it).second << endl;


    // when 17 is exceeds the maximum key, so size
    // of mp is returned as key and value as 0.

    it = mp.upper_bound(17);

    cout << "The upper bound of key 17 is ";
    cout << (*it).first << " " << (*it).second;

    return 0;
}

---

:: OUTPUT of sample
The upper bound of key 11 is 12 30
The upper bound of key 13 is 14 40
The upper bound of key 17 is 4 0

I don't understand what this C++ code has to do with the VB code in post #1 :confused:

For a simple C++ conversion of the VB code consider:

Code:

---

#include <fstream>
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
using namespace std;

int main()
{
        ifstream ifs("postable.csv");

        if (!ifs.is_open())
                return (cout << "Cannot open input file\n"), 1;

        struct data {
                double angle = 0;
                double hypot = 0;

                data(double a, double h) : angle(a), hypot(h) {}
        };

        vector<data> vd;

        //Populate the vector from the file
          for (string line; getline(ifs, line); ) {
                istringstream iss(line);
                size_t ind;
                double ang, hypot;
                char delim;

                iss >> ind >> delim >> ang >> delim >> hypot;
                vd.emplace_back(ang, hypot);
        }

        //Display the contents of the vector
        for (const auto& v : vd)
                cout << v.angle << " " << v.hypot << endl;
}

---

This will read the file and populate the vector vd with the data. The first csv value (index?) is not used as the values are added sequentially to the vector.

0 1 2 3 4 5 6
* * * * * o *
o * * * * * *
* o * * * * *
* * * * * * 0
* * * * o * *
* * * o * * *
* * o * * * *

5 x 1 =
0 x 7 =
1 x 49 =
6 x 343 =
4 x 2401 =
3 x 16807 =
2 x 117649 =
----------------------------
SUM : (CART-ID)

this is a vision cart reader as the carts are read it has a certain pattern in the grid
so what the initial goal was to provide an equivalent Class or function to the vb.net snippet earlier in the post it reads a CSV file that has 48 Values pertaining to locations on a 7 x 7 Grid 7^2

Quote:

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Originally Posted by ccodebase

the initial goal was to provide an equivalent Class or function to the vb.net snippet earlier in the post it reads a CSV file that has 48 Values pertaining to locations on a 7 x 7 Grid 7^2

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Which is my code in post #4. Are we dealing in polar co-ordinates here? So given that the vector now has these 49 polar? values, what is the next step? How are converting these polar? co-ordinates onto the 7 x 7 grid?

PS Doing a simple conversion assuming polar to Cartesian doesn't seem to give anything useful?