Question

C++ 18.27 LAB*: Program: Soccer team roster (Vectors)

This program will store roster and rating information for a soccer team. Coaches rate players during tryouts to ensure a balanced team.

(1) Prompt the user to input five pairs of numbers: A player's jersey number (0 - 99) and the player's rating (1 - 9). Store the jersey numbers in one int vector and the ratings in another int vector. Output these vectors (i.e., output the roster). (3 pts)

Ex:

Enter player 1's jersey number:
84
Enter player 1's rating:
7

Enter player 2's jersey number:
23
Enter player 2's rating:
4

Enter player 3's jersey number:
4
Enter player 3's rating:
5

Enter player 4's jersey number:
30
Enter player 4's rating:
2

Enter player 5's jersey number:
66
Enter player 5's rating:
9

ROSTER
Player 1 -- Jersey number: 84, Rating: 7
Player 2 -- Jersey number: 23, Rating: 4
...

(2) Implement a menu of options for a user to modify the roster. Each option is represented by a single character. The program initially outputs the menu, and outputs the menu after a user chooses an option. The program ends when the user chooses the option to Quit. For this step, the other options do nothing. (2 pts)

Ex:

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:

(3) Implement the "Output roster" menu option. (1 pt)

Ex:

ROSTER
Player 1 -- Jersey number: 84, Rating: 7
Player 2 -- Jersey number: 23, Rating: 4
...

(4) Implement the "Add player" menu option. Prompt the user for a new player's jersey number and rating. Append the values to the two vectors. (1 pt)

Ex:

Enter a new player's jersey number:
49
Enter the player's rating:
8

(5) Implement the "Delete player" menu option. Prompt the user for a player's jersey number. Remove the player from the roster (delete the jersey number and rating). (2 pts)

Ex:

Enter a jersey number:
4

(6) Implement the "Update player rating" menu option. Prompt the user for a player's jersey number. Prompt again for a new rating for the player, and then change that player's rating. (1 pt)

Ex:

Enter a jersey number:
23
Enter a new rating for player:
6

(7) Implement the "Output players above a rating" menu option. Prompt the user for a rating. Print the jersey number and rating for all players with ratings above the entered value. (2 pts)

Ex:

Enter a rating:
5

ABOVE 5
Player 1 -- Jersey number: 84, Rating: 7
...

Answer 1

C++ code:

#include <iostream>
#include <vector>

using namespace std;

int main() {
    // Vectors
    vector<int> jerseys;
    vector<int> ratings;

    int jerseyNumber, rating;
    char option;

    // Input 5 pairs of jersey numbers and ratings
    for (int i = 0; i < 5; i++) {
        cout << "Enter player " << i + 1 << "'s jersey number:\n";
        cin >> jerseyNumber;
        // Validate user input
        while (jerseyNumber < 0 || jerseyNumber > 99) {
            cout << "Enter player " << i + 1 << "'s jersey number (0 - 99):\n";
            cin >> jerseyNumber;
        }
        // Add jersey number to the vector
        jerseys.push_back(jerseyNumber);

        cout << "Enter player " << i + 1 << "'s rating:" << endl;
        cin >> rating;
        // Validate user input
        while (rating < 1 || rating > 9) {
            cout << "Enter player " << i + 1 << "'s rating (1 - 9):\n";
            cin >> rating;
        }
        // Add rating to the vector
        ratings.push_back(rating);
        cout << "\n";
    }

    // Output the roster
    cout << "ROSTER\n";
    for (int i = 0; i < jerseys.size(); i++) {
        cout << "Player " << i + 1 << " -- Jersey Number: " << jerseys[i] << ", Rating: " << ratings[i] << "\n";
    }
    cout << "\n";

    do {
        // Menu of options
        cout << "MENU\n";
        cout << "a - Add player\n";
        cout << "d - Remove player\n";
        cout << "u - Update player rating\n";
        cout << "r - Output players above a rating\n";
        cout << "o - Output roster\n";
        cout << "q - Quit\n\n";

        cout << "Choose an option:\n";
        cin >> option;
        cout << "\n";

        switch (option) {
            // "Output roster" menu option
            case 'o':
                cout << "ROSTER\n";
                for (int i = 0; i < jerseys.size(); i++) {
                    cout << "Player " << i + 1 << " -- Jersey Number: " << jerseys[i] << ", Rating: " << ratings[i] << "\n";
                }
                break;

            // "Add player" menu option
            case 'a':
                cout << "Enter a new player's jersey number:\n";
                cin >> jerseyNumber;
                // Validate user input
                while (jerseyNumber < 0 || jerseyNumber > 99) {
                    cout << "Enter a new player's jersey number (0 - 99):\n";
                    cin >> jerseyNumber;
                }
                // Add jersey number to the vector
                jerseys.push_back(jerseyNumber);

                cout << "Enter the player's rating:" << endl;
                cin >> rating;
                // Validate user input
                while (rating < 1 || rating > 9) {
                    cout << "Enter the player's rating (1 - 9):\n";
                    cin >> rating;
                }
                // Add rating to the vector
                ratings.push_back(rating);
                break;

            // "Delete player" menu option
            case 'd':
                cout << "Enter a jersey number:\n";
                cin >> jerseyNumber;
                for (int i = 0; i < jerseys.size(); i++) {
                    if (jerseys[i] == jerseyNumber) {
                        jerseys.erase(jerseys.begin() + i);
                        ratings.erase(ratings.begin() + i);
                        break;
                    }
                }
                break;

            // "Update player rating" menu option
            case 'u':
                cout << "Enter a jersey number:\n";
                cin >> jerseyNumber;
                cout << "Enter a new rating for player:\n";
                cin >> rating;
                // Validate user input
                while (rating < 1 || rating > 9) {
                    cout << "Enter a new rating for player (1 - 9):\n";
                    cin >> rating;
                }

                for (int i = 0; i < jerseys.size(); i++) {
                    if (jerseys[i] == jerseyNumber) {
                        ratings[i] = rating;
                    }
                }
                break;

            // "Output players above a rating" menu option
            case 'r':
                cout << "Enter a rating:\n";
                cin >> rating;
                cout << "ABOVE " << rating << "\n";
                for (int i = 0, count = 0; i < ratings.size(); i++) {
                    if (ratings[i] > rating) {
                        count++;
                        cout << "Player " << count << " -- Jersey Number: " << jerseys[i] << ", Rating: " << ratings[i] << "\n";
                    }
                }
                break;

            case 'q':
                break;

            default:
                cout << "Invalid option. Try again.\n";
        }
        cout << "\n";
    } while (option != 'q');

    return 0;
}

Sample output:

Enter player 1's jersey number:
84
Enter player 1's rating:
7

Enter player 2's jersey number:
23
Enter player 2's rating:
4

Enter player 3's jersey number:
4
Enter player 3's rating:
5

Enter player 4's jersey number:
30
Enter player 4's rating:
2

Enter player 5's jersey number:
66
Enter player 5's rating:
9

ROSTER
Player 1 -- Jersey Number: 84, Rating: 7
Player 2 -- Jersey Number: 23, Rating: 4
Player 3 -- Jersey Number: 4, Rating: 5
Player 4 -- Jersey Number: 30, Rating: 2
Player 5 -- Jersey Number: 66, Rating: 9

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
o
ROSTER
Player 1 -- Jersey Number: 84, Rating: 7
Player 2 -- Jersey Number: 23, Rating: 4
Player 3 -- Jersey Number: 4, Rating: 5 
Player 4 -- Jersey Number: 30, Rating: 2
Player 5 -- Jersey Number: 66, Rating: 9

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating       
o - Output roster
q - Quit

Choose an option:
a
Enter a new player's jersey number:
49
Enter the player's rating:
8

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
o
ROSTER
Player 1 -- Jersey Number: 84, Rating: 7
Player 2 -- Jersey Number: 23, Rating: 4
Player 3 -- Jersey Number: 4, Rating: 5 
Player 4 -- Jersey Number: 30, Rating: 2
Player 5 -- Jersey Number: 66, Rating: 9
Player 6 -- Jersey Number: 49, Rating: 8

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
d
Enter a jersey number:
4

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
o
ROSTER
Player 1 -- Jersey Number: 84, Rating: 7
Player 2 -- Jersey Number: 23, Rating: 4
Player 3 -- Jersey Number: 30, Rating: 2
Player 4 -- Jersey Number: 66, Rating: 9
Player 5 -- Jersey Number: 49, Rating: 8

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
u
Enter a jersey number:
23
Enter a new rating for player:
6

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
o
ROSTER
Player 1 -- Jersey Number: 84, Rating: 7
Player 2 -- Jersey Number: 23, Rating: 6
Player 3 -- Jersey Number: 30, Rating: 2
Player 4 -- Jersey Number: 66, Rating: 9
Player 5 -- Jersey Number: 49, Rating: 8

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
r
Enter a rating:
5
ABOVE 5
Player 1 -- Jersey Number: 84, Rating: 7
Player 2 -- Jersey Number: 23, Rating: 6
Player 3 -- Jersey Number: 66, Rating: 9
Player 4 -- Jersey Number: 49, Rating: 8

MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit

Choose an option:
q

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