Question

i have two issues that i need help.

1- that in case three and two only one line is being read from the file

2- my case 4 is not working correctly as it should as the output is only

" Enter 1 for Trump, 2 for Warren:"

#include <iostream>
#include <cctype> // For the letter checking functions
#include <fstream> // For file input
#include <iomanip> // For setw
#include <ctime>
#include <cstdlib> // For exit and abs
#include <errno.h>
#include <string>
//#include <string.h>

using namespace std;

int main() {
   //import random;
     
   int option;                   //Option user select is saved in this variable.
   int print_lines = 1;       //Lines to print is selected by a user.
   int trump_lines = 0;       //Total lines in a trump file.
   int warren_lines = 0;       //Total lines in a warren file.
   int random_start = 1;       //Random start location to read from a file.
   int line_num = 0;
int userInput; //Current line number reading from a file.
int numberOfQuizzes; // How many times a quiz has been taken.
int numberOfQuizCorrect; // How many times the user got the quiz correct.
   string read_line;           //Read line from a file is stored in this string.
   ifstream trump;               //trump file object.
   trump.open("Trump.txt");   //Open a trump file.
   if (!trump.is_open())
   {
       cout << "Trump file is not opened.\n";
       cout << "Error code is: " << errno << endl;
       return -1;
   }
   getline(trump, read_line);
   trump_lines = stoi(read_line); //Assign total lines in a trump file.

   ifstream warren;
   warren.open("Warren.txt");
   if (!warren.is_open())
   {
       cout << "Warren file is not opened.\n";
       cout << "Error code is: " << errno << endl;
       return -1;
   }
   getline(warren, read_line);
   warren_lines = stoi(read_line);   //Assign total lines in a warren file.
   //Initialize Random number generator.
   srand(time(0));

   while(true)
   {
       cout << " Program 2: Rally Songs "<<endl;
cout <<"Select from the following:\n";
       cout << " 1. Set number of lines to display\n";
       cout << " 2. Get random lines from Trump.txt\n";
       cout << " 3. Get random lines from Warren.txt\n";
       cout << " 4. Rally song quiz\n";
       cout << " 5. Exit the program\n";
cout << "Your choice --> ";   
       //cout << "Choose One of the above option.\n";
       cin >> option;

       switch (option)
       {
       case 1:
           cout << "Enter number of lines to print.\n";
           cin >> print_lines;
           break;
       case 2:

           random_start = rand() % (trump_lines - print_lines);
           line_num = 0;
           while (line_num != random_start && getline(trump, read_line))
           {
               line_num++;
           }
           for (int i = 0; i < print_lines; i++)
           {
               getline(trump, read_line);
               cout << read_line << endl;
           }
           trump.seekg(0);           //Set file pointer to start of a file.
           //cout << getline(trump, read_line) << endl;
           break;

       case 3:
           random_start = rand() % (warren_lines - print_lines);

           line_num = 0;
           while (line_num != random_start && getline(warren, read_line))
           {
               line_num++;
           }
           for (int i = 0; i < print_lines; i++)
           {
               getline(warren, read_line);
               cout << read_line << endl;
           }
           warren.seekg(0);               //Set file pointer to start of a file.
           break;
       case 4:

// Get random lines from a mystery candidate, and prompt for user guess
if( rand() % 2 == 0) {
read_line = "Trump.txt";
}
else {
read_line = "Warren.txt";
}
// Get the user guess of who it is
cout << endl;
cout << "Enter 1 for Trump, 2 for Warren: ";
cin >> userInput;
  
cout << endl;
  
// Compare user guess to correct answer and update quiz score.
numberOfQuizzes++; // Increment the number of times the quiz has been taken
// Give a point if quiz answer was correct
if( (userInput == 1 ?: trump_lines == 'Trump.txt' ) ||
(userInput == 2 ?: warren_lines == 'Warren.txt' )
) {
cout << "Correct! ";
numberOfQuizCorrect++;
}
else {
cout << "Wrong! ";
}
           return 0;

       }
          

   }
      
}

Answer 1

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#include <iostream>
#include <cctype>       // For the letter checking functions
#include <fstream>       // For file input
#include <iomanip>       // For setw
#include <ctime>
#include <cstdlib>       // For exit and abs
#include <errno.h>
#include <string>

using namespace std;

int main ()
{
int option;           //Option user select is saved in this variable.
int print_lines = 1;       //Lines to print is selected by a user.
int trump_lines = 0;       //Total lines in a trump file.
int warren_lines = 0;       //Total lines in a warren file.
int random_start = 1;       //Random start location to read from a file.
int line_num = 0;
int userInput;       //Current line number reading from a file.
int numberOfQuizzes;       // How many times a quiz has been taken.
int numberOfQuizCorrect;   // How many times the user got the quiz correct.
string read_line;       //Read line from a file is stored in this string.
ifstream trump;       //trump file object.
trump.open ("Trump.txt");   //Open a trump file.
if (!trump.is_open ())
{
cout << "Trump file is not opened.\n";
cout << "Error code is: " << errno << endl;
return -1;
}
//getline (trump, read_line);
//trump_lines = stoi (read_line);
//Assign total lines in a trump file.
while (getline(trump, read_line))
trump_lines++; //This should be the logic for total lines

ifstream warren;
warren.open ("Warren.txt");
if (!warren.is_open ())
{
cout << "Warren file is not opened.\n";
cout << "Error code is: " << errno << endl;
return -1;
}
//getline (warren, read_line);
//warren_lines = stoi (read_line);  
//Assign total lines in a warren file.
while (getline(warren, read_line))
warren_lines++; //This should be the logic for total lines
//Initialize Random number generator.
srand(time(0));

while (true)
{
cout << " Program 2: Rally Songs " << endl;
cout << "Select from the following:\n";
cout << " 1. Set number of lines to display\n";
cout << " 2. Get random lines from Trump.txt\n";
cout << " 3. Get random lines from Warren.txt\n";
cout << " 4. Rally song quiz\n";
cout << " 5. Exit the program\n";
cout << "Your choice --> ";
cin >> option;
switch (option)
   {
   case 1:
   cout << "Enter number of lines to print.\n";
   cin >> print_lines;
   break;
   case 2:
   trump.seekg(0);
   //Correrction in printing random lines
   for(int i=0;i< print_lines;i++)
   {
   random_start = rand() % trump_lines;
   line_num=0;
while(getline(trump, read_line))
{
line_num++;
if(line_num == random_start)
{
cout << read_line<<endl;
}
}
   }
// random_start = rand () % (trump_lines - print_lines);
   // line_num = 0;
   // while (line_num != random_start && getline (trump, read_line))
   // {
   // line_num++;
   // }
   // for (int i = 0; i < print_lines; i++)
   // {
   // getline (trump, read_line);
   // cout << read_line << endl;
   // }
   trump.seekg(0);   //Set file pointer to start of a file.
   break;
   case 3:
   warren.seekg(0);
   //Correrction in printing random lines
   for(int i=0;i< print_lines;i++)
   {
   line_num=0;
   random_start = rand() % warren_lines;
while(getline(warren, read_line))
{
line_num++;
if(line_num == random_start)
{
cout << read_line<<endl;
}
}
   }
   // random_start = rand () % (warren_lines - print_lines);
// line_num = 0;
   // while (line_num != random_start && getline (warren, read_line))
   // {
   // line_num++;
   // }
   // for (int i = 0; i < print_lines; i++)
   // {
   // getline (warren, read_line);
   // cout << read_line << endl;
   // }
   warren.seekg (0);   //Set file pointer to start of a file.
   break;
   case 4:
// Get random lines from a mystery candidate, and prompt for user guess
int ans;
   if (rand () % 2 == 0)
   {
   //read_line = "Trump.txt";
   ans=1;//Added additional variable to check for option
   getline(trump, read_line);
   cout<<read_line<<endl;
   }
   else
   {
   //read_line = "Warren.txt";
   ans=2;
   getline(warren, read_line);
   cout<<read_line<<endl;
   }
// Get the user guess of who it is
   cout << endl;
   cout << "Enter 1 for Trump, 2 for Warren: ";
   cin >> userInput;
   cout << endl;
// Compare user guess to correct answer and update quiz score.
   numberOfQuizzes++;   // Increment the number of times the quiz has been taken
// Give a point if quiz answer was correct
   // if ((userInput == 1 ? : trump_lines == 'Trump.txt') ||
   // (userInput == 2 ? : warren_lines == 'Warren.txt'))
   if((userInput==1 && ans==1) ||(userInput==2 && ans==2))//Checking if userInput is correct
   {
   cout << "Correct! ";
   numberOfQuizCorrect++;
   }
   else
   {
   cout << "Wrong! ";
   }
   return 0;
   }
}
}

You had some logic errors which is corrected