Question

I'm writing a simple High-Low Game for my Fundamentals of Programming I class but in Visual Studios it keeps saying that my two different functions are undeclared I don't know where the problem is could you help? This is what I have so far:

#include<iostream>
#include<cstdlib>
#include<ctime>
#include<string>
using namespace std;
int main();
int rndmNum();

int rndmNum() {
   int num, n;
   srand(time(0));
   num = rand() % 100 + 1;
   return num;
}

int userGuess(int num) {
   int n, num, i;
   for (int i = 0;i < 10;i++)
   {
       cout << "Enter a number between 1 to 100:";
       cin >> n;
       if (n < num)
           cout << "it''s too low\n";
       else if (n > num)
           cout << "it's too high\n";
       else
           cout << "Guessed number is correct";
       break;
   }
}

int main() {
   int rndmNum;
   int userGuess;
  
   return 0;
}

Answer 1

There were some syntax errors as well as some logical mistakes in the code, here is the fixed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#include <iostream>

#include <cstdlib>

#include <ctime>

#include <string>

using namespace std;

int main();

int rndmNum();

//method that generates and returns a random number between 1 and 100

int rndmNum()

{

    int num, n;

    num = rand() % 100 + 1;

    return num;

}

//this method takes a num, loops for maximum 10 times, read user input to see if it is equal to num

//returns the number of guesses it took for the user to guess the answer correctly.

//returns -1 if user is unable to guess it even after 10 attempts

int userGuess(int num)

{

    int n, i;

    //looping for 10 times

    for (int i = 1; i <= 10; i++) {

        cout << "Enter a number between 1 to 100: ";

        cin >> n;

        if (n < num)

            cout << "it''s too low\n";

        else if (n > num)

            cout << "it's too high\n";

        else {

                //user guess is correct

            cout << "Guessed number is correct" << endl;

            return i; //returning the number of attempts took

        }

    }

    return -1; //user could not guess in 10 attempts

}

int main()

{

                //seeding random number generator. this should be done ONLY once.

                srand(time(0));

                //generating a random number, storing it in rand_number, previously you were trying to

                //initialize a number rndmNum, it can't be allowed as it has the same name as rndmNum method

    int rand_number = rndmNum();

    //calling userGuess method, getting the number of attempts it took

    int counts = userGuess(rand_number);

    //if counts is -1, user is unable to guess

    if (counts == -1) {

        cout << "Sorry! You could not win. The number was: " << rand_number << endl;

    }

    //otherwise displaying the attempts took

    else {

        cout << "You guessed it in " << counts << " attempts" << endl;

    }

    return 0;

}