Need help to create a function for a roulette simulation?

2021 2 12
1 个回答
回答已采纳
更新时间：2021 2 13
5 次查看（30 天）

0 个投票

My function does not work and i don't know how to link my input number n with the simulation of the roulette.
There are 18 red, 18 black and 1 green fields. If the ball lands on the field which the user choose then he gets the money back and gets the same amount of money which he used. if the ball lands not on the field which the user choose then he loose his money.
function [red, black] = n_montecarlo(n)
red = [3 12 7 18 9 14 1 16 5 23 30 36 27 34 25 21 19 32];
black = [26 35 28 29 22 31 20 33 24 10 8 11 13 6 17 2 4 15];
roulette = randi(37);
for n = red
if roulette == n
disp('win')
else
disp('lose')
for n = black
if roulette == n
disp('win')
else
disp('lose')
end
end
end
end
end

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 采纳的回答

Jan
Jan 2021-2-13

0 个投票

"If the ball lands on the field which the user choose"
How does thze user choose a field? By the input n? This input is overwritten by
for n = red
Perhaps you want:
function n_montecarlo(n)
red = [3 12 7 18 9 14 1 16 5 23 30 36 27 34 25 21 19 32];
black = [26 35 28 29 22 31 20 33 24 10 8 11 13 6 17 2 4 15];
roulette = randi(37);
if n == roulette
disp('win')
else
disp('lose')
end
if any(n == red)
disp('red')
elseif any(n == black)
disp('black')
else
disp('green')
end
end

6 个评论
显示 4更早的评论 隐藏 4更早的评论

Steven Thies
Steven Thies 2021-2-13
I appreciate that a lot. Thank you man thats perfect. And i can work with that. Now i understand the concept.
Steven Thies
Steven Thies 2021-2-13
How can i put the function into a script. When i put the function in my script it does not work.
Jan
Jan 2021-2-13
Please explain, what "put function into a script" and "it does not work" exactly means. Post your code and the error message or explain the difference between the results and your expectations.
Steven Thies
Steven Thies 2021-2-13
I want a Script which asks the User to choose between red or black. There are 18 red, 18 black and 1 green fields on the roulette. If the ball lands on the colour of the field which the user choosed then the user gets his money back and the same amount of money to total. If the ball lands not on the field which the user choosed before then he loose his money. The Script should tell the user how much money he won or lost with disp.
Thank you for your time.
Steven Thies
Steven Thies 2021-2-13
编辑：Jan 2021-2-13
This is my Script. The function is n_montecarloreal(n) which i have already.
n = input('please choose a number.For red(3,12,7,18,9,14,1,16,5,23,30,36,27,34,25,21,19,32),black(26,35,28,29,22,31,20,33,24,10,8,11,13,6,17,2,4,15): ','s');
while isnan(str2double(n)) == true
n = input('Error.Please again ','s');
end
n = str2double(n);
m = n_montecarloreal(n);
output = (num2str(m));
disp(output)
function n_montecarloreal(n)
red = [3 12 7 18 9 14 1 16 5 23 30 36 27 34 25 21 19 32];
black = [26 35 28 29 22 31 20 33 24 10 8 11 13 6 17 2 4 15];
roulette = randi(37);
if n == roulette
disp('win')
else
disp('lose')
end
if any(n == red)
disp('red')
elseif any(n == black)
disp('black')
else
disp('green')
end
end
Jan
Jan 2021-2-13
Your function n_montecarloreal(n) does not have an output yet. Maybe all you need is:
function Won = n_montecarloreal(n)
roulette = randi(37);
Won = (roulette == n);
end

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