cs-142:family-feud [CS Wiki]

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+=Family Feud!=
+==Background==
+* You want a program to track points for two teams on (a simplified) Family Feud game!
+* In each round a survey question is given that has been asked to 100 people and the top answers have been recorded
+* To start the round, a representative from each team is chosen two play in a “toss-up”
+* The survey question is read
+* Whichever team’s rep buzzes in and correctly guesses a top answer first, that team gets to guess the rest of the top survey answers
+* Points are allotted based on the popularity of the survey answer
+==Problem==
+* You want a program to track points for two teams
+* By using a pointer, it is possible to switch to a different team without modifying the code for adjusting a team’s score.
+* Start with two score-keeping variables:
+** int team_A_score = 0;
+** int team_B_score = 0;
+* How would you write code to adjust the score of whichever team wins the toss-up?
+* For each of five rounds (i.e., survey questions),
+** Prompt for the team that won the toss-up
+** Prompt for points to add for each guess
+** End the round after three wrong guesses (i.e., 0 points added)
+* Print out the winner
+* Let’s play the Feud!
+==Solution==
+<code cpp>
+#include <iostream>
+#include <vector>
+#include <string>
+using namespace std;
+const int MATCH_MISS_COUNT = 3;
+const int ROUNDS = 2;
+string prompt_for_team();
+int prompt_for_points();
+int main()
+{
+	int team_A_score = 0;
+	int team_B_score = 0;
+	// By using a pointer, we can write code to adjust an arbitrary team's score and switch to different teams as necessary.
+	int * winning_team_score = NULL;
+	// SIMULATE MULTIPLE ROUNDS
+	for (int round = 0; round < ROUNDS; round++)
+	{
+		// SIMULATE ONE ROUND
+		// Prompt for the team that won the toss-up (winning_team_score)
+		string winning_team = prompt_for_team();
+		if (winning_team == "A")
+		{
+			// A pointer must be assigned to the address of a variable
+			winning_team_score = &team_A_score;
+		}
+		else if (winning_team == "B")
+		{
+			winning_team_score = &team_B_score;
+		}
+		int wrong_guesses = 0;
+		while (wrong_guesses < 3)
+		{
+			// Prompt for points to add for each guess
+			int points_to_add = prompt_for_points();
+			if (points_to_add == 0)
+			{
+				wrong_guesses++;
+			}
+			else
+			{
+				// We avoid having to duplicate this code for both team A and team B by using a pointer
+				(*winning_team_score) = (*winning_team_score) + points_to_add;
+			}
+			// End the guessing after a certain number of wrong guesses (i.e., 0 points added)
+		}
+		cout << "Score at end of round " << round << " is A - " << team_A_score << ", B - " << team_B_score << endl;
+	}
+	cout << "Team " << (team_A_score > team_B_score ? "A" : "B") << " WINS!" << endl;
+	cout << "GAME OVER" << endl;
+	system("pause");
+	return 0;
+}
+/*
+Prompt for team that won the toss-up, read the input (no input validation)
+@return user input (A or B)
+*/
+string prompt_for_team()
+{
+	cout << "In the toss-up, which was the winning team (A,B)? ";
+	string team_that_answered;
+	cin >> team_that_answered;
+	return team_that_answered;
+}
+/*
+Prompt for points to be added (no input validation)
+@return user input (points)
+*/
+int prompt_for_points()
+{
+	cout << "Points to add:";
+	int points_to_add;
+	cin >> points_to_add;
+	return points_to_add;
+}
+</code>

cs-142/family-feud.txt · Last modified: 2015/06/04 12:02 by cs142ta

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