C/C++ Replacing stoi in C++ program for converting string to integer

[elmessican]

What can I use to replace stoi since the homework program won't accept it? I'm trying to read a string and display it as an integer. I know I have to use stringstream but have no idea how.

//ReadData.cpp

#include <iostream>
#include <cstring>
#include <cstdlib>
#include <string>
#include <vector>
#include <sstream>
#include <iomanip>
#include <stdlib.h>

using namespace std;

int main() {
   
   

    //Define the required variables

    string title, head1, head2, s;
   vector<string> data;

   vector<int> point;

    //Prompt and read the title of the data

    cout << "Enter a title for the data: " << endl;

    getline(cin, title);

    cout << "You entered: " << title << endl;
    cout << endl;

    //Prompt and read the headers of two columns

    cout << "Enter the column 1 header: " << endl;

    getline(cin, head1);

    cout << "You entered: " << head1 << endl;
    
        cout << endl;    cout << "Enter the column 2 header: " << endl;

    getline(cin, head2);

    cout << "You entered: " << head2 << endl;
        cout << endl;    //Use while loop to read the data points until user enters -1

    while (1) {

         cout << "Enter a data point (-1 to stop input): " << endl;

         getline(cin, s);

         if (s == "-1") {

             break;

         }

         if (s.find(',') == -1) {

             cout << "Error: No comma in string." << endl;
               cout << endl;
         }

         else {

             int count = 0;

             for (int i = 0; i<s.length(); i++) {

                 if (s.at(i) == ',') {

                      count++;

                      if (count > 1) {

                          break;

                      }

                 }

             }

             //If the input have single ',', then display the data string and data integer

             if (count == 1) {

                 data.push_back(s.substr(0, s.find(',')));

               point.push_back(stoi(s.substr(s.find(',') + 1, s.length() - 1)));

                 cout << "Data string: " << s.substr(0, s.find(',')) << endl;
         

                 cout << "Data integer: 6" << stoi.s.substr(s.find(',') + 1, s.length() - 1) << endl;
                  cout << endl;
             }

             else {

                 //Display the appropriate error message

                 cout << "Error: Too many commas in input." << endl;
                  cout << endl;
             }

         }

    }

    //Display the data in the required format

    cout << "\t" << title << "\t" << endl;

    cout << head1 << "\t|\t" << head2 << endl;

    for (int i = 0; i<data.size(); i++) {

         cout << data[i] << "\t|\t" << point[i] << endl;

    }

    for (int i = 0; i<data.size(); i++) {

         cout << data[i] << " ";

         for (int j = 0; j<point[i]; j++) {

             cout << "*";

         }

         cout << endl;

    }

    

    return 0;

}

 

[BAdhi]

As I could see you've used stoi incorrectly.. are you sure it's not

stoi(substr(...))

You've used

stoi.substr(...)

stoi - C++ Reference
If you want to use string streams,

string tempstring = substring(...);
int tempint;

stringstream strstream;

strstream << tempstring;
strstream >> tempint;

 

[elmessican]

I changed that and I still get this error apparently the compiler is not up to date with c++11 and doesn't recognizes 'stoi', how can I add the stringstream to my code. It would be a great help if you could show me. Thanks.main.cpp:97:78: error: 'stoi' was not declared in this scope
point.push_back(stoi(s.substr(s.find(',') + 1, s.length() - 1)));

 

[BAdhi]

Oh yeah std::stoi is a c++11 feature so unless your complier doesn't support c++11 you won't be able to use it. I have given you an example on how to use the stringstream, is there anything not clear about it?

 

[elmessican]

Yea I think I get it but i just don't know how or where to added to my code lol