Question

Create MATLAB code for a rock paper scissors game. It is expected to use an if statement, a loop, and a function in the code. Make sure to properly comment the code as well.

Answer 1

CODE:

n = input('Enter the number of times you wish to play ');
i = 0;
player_Score = 0; % intialise the scores
computer_Score = 0;
while i < n % iterate over the number of times user wishes to play
player_plays = input('Enter r/p/s to play ','s'); % prompt the user for his turn
computer_plays_out = computer_plays();
fprintf(['Computer played ' computer_plays_out '\n']); % output what the computer played
if player_plays == 'r' % if player plays rock update the scores accordingly
if computer_plays_out == 'p'
computer_Score = computer_Score + 1;
elseif computer_plays_out == 's'
player_Score = player_Score + 1;
end
elseif player_plays == 'p' % if player plays scissors update the scores accordingly
if computer_plays_out == 's'
computer_Score = computer_Score + 1;
elseif computer_plays_out == 'r'
player_Score = player_Score + 1;
end
elseif player_plays == 's' % if player plays paper update the scores accordingly
if computer_plays_out == 'r'
computer_Score = computer_Score + 1;
elseif computer_plays_out == 'p'
player_Score = player_Score + 1;
end
else
fprintf('Enter valid input'); % prompt the user for another time without incrementing i
i = i-1;
end
i = i+1; % Update the loop counter
fprintf("Scores\n Player : %.f \n Computer : %.f \n",player_Score,computer_Score); % Show the scores
end
if player_Score > computer_Score % Show the results
fprintf("You beat the computer by %.f \n",player_Score-computer_Score);
elseif player_Score < computer_Score
fprintf("You lost to computer by %.f \n",-player_Score+computer_Score);
else
fprintf("It was a tie \n");
end
function out = computer_plays() % returns 'r' / 'p' / 's' randomly
output_arr = ['r' 'p' 's'];
random_num = randi(3); % randi(a) returns a random number between 1 and a
out = output_arr(random_num); % return r,p,s randomly
end