Hi, I need help with my C++ code. The steps says that I need to allow uppercase

Question

Hi, I need help with my C++ code. The steps says that I need to allow uppercase or lowercase Y and N as the answers. I need to decide how to handle input validation -- that is, what to do if the user enters something other than Y or N. So, I need to add something that blocks something other than Y or N in the code when the question of would you like to play again in the code appears wihout using return 0 since it is not allowed. Thanks

#include <iostream>

using std::cout; //allows the program to perform input and output

using std::cin;

using std::endl;

#include<cstdlib>

//Library to tell time

#include <ctime>

using std::time;

//Function templates

int getRandomInt();

int printMessage(int, int);

int main()

{

//Print my name and this assignment's title

cout << "LAB 4c: Tabular Formatting [ Guess.cpp ] ";

cout << "Programmer: Juan Gomez ";

cout << "Editor(s) used: Sublime Text 3 ";

cout << "Compiler(s) used: Visual Studio 2015";

cout << "File: " << __FILE__ << endl;

cout << "Compiled: " << __DATE__ << " at " << __TIME__ << endl << endl;

bool playAgain = true;

while (playAgain) //While playAgain is true, the loop will continue until it is false.

{

//Declaring the variable for the buffer.

//Declaring integer variable for 'userGuess' so that the user can input the number guessed.

//Declaring integer variable 'randomInt' so that the random machine choosen by the machine

//in the function 'getRandomInt' is passed to the integer variable 'randomInt'.

char buf[100];

int userGuess;

int randomInt = getRandomInt();

//Prompt user for input to choose a number between 1 and 1000

//and guess the number from the machine.

//The user will enter the number guessed and save it in the buffer

//using the 'string buffer method' and converted to integer by 'atoi'.

cout << "I have a number between 1 and 1000" << endl;

cout << "Can you guess my number?" << endl;

cout << "Please type your first guess: ";

cin >> buf; userGuess = atoi(buf);

cin.ignore(1000, 10);

while (true) //While the loop is true,the loop for 'userGuess' inside of the function 'printMessage'

{ //will continue until it is false and the user does not want to play anymore.

//Calling the function 'printMessage' so that the logic for repeating guesses can work.

int returnVal = printMessage(userGuess, randomInt);

if (returnVal == 1) //if the user chooses 'y' the loop for repeating guesses will be

//called again.

{

//Loop to display the user if he/she wants to play again the game.

//'Buffer method' to allow the user to input 'y' or 'Y' for yes

//and 'n' or 'N' for no.

//If the user chooses 'n' the loop will return false and the loop will break

//If the user chooses 'y' the loop will break but the program will start again with

//the guessing game.

cout << "Would you like to play again (y or n)?: ";

cin >> buf;

cin.ignore(1000, 10);

if (buf[0] == 'y' || buf[0] == 'Y')

{

break;

}

if (buf[0] == 'n' || buf[0] == 'N')

{

playAgain = false; //If the user hits 'n' it will convert 'playAgain' false.

break;

}

if (buf[0] != 'y' && buf[0] != 'Y'&& buf[0] != 'n' && buf[0] != 'N')

{

cout << "Please enter correct input.. either 'y' or 'n'" << endl;

}

}

else

{

cin >> buf; userGuess = atoi(buf); //'Buffer method' to allow the user to input the numbers until

cin.ignore(1000, 10); //the guess is correct.

}

}

if (playAgain == false) //The program will check if 'playAgain' is false.

{ //If it is false 'playAgain' will return false and will break the loop.

break;

}

}

}

ompiled: Sep 16 2017 at 22:43:40 I have a number between 1 and 1000 an you guess my number? Please type your first guess: 300 oo high. Try again: 406e oo high. Try again: 206e oo low. Try again: 250 oo low. Try again: 27e oo low. Try again: 286e oo high. Try again: 277 oo high. Try again: 276 oo high. Try again: 275 oo high. Try again: 274 oo high. Try again: 273 oo high. Try again: 272 oo high. Try again: 271 Excellent! You guessed the number! ould you like to play again (y or n)?: ds Please enter correct input .. either 'y' or 'n' Excellent! You guessed the number! ould you like to play again (y or n)?:

Explanation / Answer

//Please see the code below

#include <iostream>
#include <cstdlib>
#include <ctime>
using std::cout; //allows the program to perform input and output

using std::cin;

using std::endl;

int main(void) {
   srand(time(NULL)); // To not have the same numbers over and over again.
  

   while(true) {
       char answer;
       int number = rand() % 1000; // System number is stored in here.
       int guess; // User guess is stored in here.
       int tries = 0; // Number of tries is stored here.
              
       //std::cout << number << " "; // Was used for debug...
      
       while(true) { // Get user number loop.
           // Get number.
           std::cout << "I have a number between 1 and 1000 " <<endl;
           cout << "Can you guess my number?" << endl;
           cout << "Please type your first guess: ";
           label_01:
           std::cin >> guess;
           std::cin.ignore();
          
           // Check number.
           if(guess > number) {
               std::cout << "Too high! Try again. : ";
               goto label_01;
           } else if(guess < number) {
               std::cout << "Too low! Try again. : ";
               goto label_01;
           } else {
               break;
           }
          
           // If not number, increment tries.
           tries++;
       }
      
           std::cout<<"Excellent! " << std::endl;
           std::cout<<"You guessed the number" << endl;
       while(true) { // Loop to ask user is he/she would like to play again.
           // Get user response.
           std::cout << "Would you like to play again (Y/N)? ";
           std::cin >> answer;
           std::cin.ignore();
          
           // Check if proper response.
           if(answer == 'n' || answer == 'N' || answer == 'y' || answer == 'Y') {
               break;
           } else {
               std::cout << "Please enter 'Y' or 'N'... ";
           }
       }
      
       // Check user's input and run again or exit;
       if(answer == 'n' || answer == 'N') {
           std::cout << "Thank you for playing!";
           break;
       } else {
           std::cout << " ";
       }
   }
  
   // Safely exit.
   std::cout << " Enter anything to exit. . . ";
   std::cin.ignore();
   return 0;
}

OUTPUT:

I have a number between 1 and 1000
Can you guess my number?
Please type your first guess: 300
Too high! Try again. :200
Too low! Try again. :250
Too low! Try again. :280
Too high! Try again. :275
Excellent!
You guessed the number
Would you like to play again (Y/N)? sa
Please enter 'Y' or 'N'...
Would you like to play again (Y/N)?

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