C++ (1) Prompt the user for a title for data. Output the title. (1 pt) Ex: (2) P

Question

C++

(1) Prompt the user for a title for data. Output the title. (1 pt)

Ex:

(2) Prompt the user for the headers of two columns of a table. Output the column headers. (1 pt)

Ex:

(3) Prompt the user for data points. Data points must be in this format: string, int. Store the information before the comma into a string variable and the information after the comma into an integer. The user will enter -1 when they have finished entering data points. Output the data points. Store the string components of the data points in a vector of strings. Store the integer components of the data points in a vector of integers. (4 pts)

Ex:

(4) Perform error checking for the data point entries. If any of the following errors occurs, output the appropriate error message and prompt again for a valid data point.

If entry has no comma

Output: Error: No comma in string. (1 pt)

If entry has more than one comma

Output: Error: Too many commas in input. (1 pt)

If entry after the comma is not an integer

Output: Error: Comma not followed by an integer. (2 pts)

Ex:

(5) Output the information in a formatted table. The title is right justified with a setw() value of 33. Column 1 has a setw() value of 20. Column 2 has a setw() value of 23. (3 pts)

Ex:

(6) Output the information as a formatted histogram. Each name is right justified with a setw() value of 20. (4 pts)

Ex:

Explanation / Answer

// Histo.cpp : Defines the entry point for the console application.
//make small helper methods to reduce size of main

#include <iostream>

#include <string>
#include <vector>
#include <sstream>
using namespace std;
int main()
{
   string title;
   string header1;
   string header2;
   vector<int> values;
   vector<string> names;
   string str;
   string number;
   string datastring;
   int datainteger;
  

   cout << "enter title for data" << endl;
   cin >> title;
   cout << "you entered " << title << endl;

   cout << "enter header for column1" << endl;
   cin >> header1;
   cout << "you entered " << header1 << endl;

   cout << "enter header for column2" << endl;
   cin >> header2;
   cout << "you entered " << header2 << endl;

   while (true)
   {
       cout << "Enter a data point in format name,value (-1 to stop input):" << endl;
       cin >> str ;
       if (str == "-1")
       {
           break;
       }
      
       std::string delimiter = ",";

       int index1 = str.find(delimiter);

       if (index1 == -1)
       {
           cout << "no comma" << endl;
           continue;
      
       }

       datastring = str.substr(0,index1 );
       string s = str.substr(index1+1, str.length() - 1);

       names.push_back(datastring);
      
       int index2 = s.find(delimiter);
  
       if (index2 != -1)
       {
           cout << "too many commas" << endl;
           continue;

       }

       number = str.substr(index1+1, str.length() - 1);
          

       try
       {
           datainteger = stoi(number);
      
       }
       catch (exception e)
       {
           cout << "token after comma is not an integer" << endl;
       }
      

       values.push_back(datainteger);
       cout << "data string" << datastring << endl;
       cout << "data integer" << datainteger << endl;
  
   }

return 0;
}

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.