Problem with multiple choice questions

[Dazzy]

Hi, yeah so I've been trying to get some multiple choice questions into my game. The thing it's supposed to do is 1. pick a random question 2. pick four random answers where one of them is the correct one, it shouldn't be choosing two of the same answers. But that's, unfortunately, the case. Here's the code where it picks a random answer out of four, while looking at what the previously chosen answers are.

if (global.variableans1 == 1 ^^ global.variableans2 == 1)
{
sprite_index = choose(ans1wrong1,ans1wrong2,ans1wrong3);
}
else if (global.variableans1 == 2 ^^ global.variableans2 == 2)
{
sprite_index = choose(ans1correct,ans1wrong2,ans1wrong3);
}
else if (global.variableans1 == 3 ^^ global.variableans2 == 3)
{
sprite_index = choose(ans1correct,ans1wrong1,ans1wrong3);
}
else if (global.variableans1 == 4 ^^ global.variableans2 == 4)
{
sprite_index = choose(ans1correct,ans1wrong1,ans1wrong2);
}
if (sprite_index == ans1correct)
{
global.variableans3 = 1
}
else if (sprite_index == ans1wrong1)
{
global.variableans3 = 2
}
else if (sprite_index == ans1wrong2)
{
global.variableans3 = 3
}
else if (sprite_index == ans1wrong3)
{
global.variableans3 = 4
}

 

[curato]

yeah that choose isn't going to guarantee you four different answers. In theory they could all be the same answer that is just how random works. You could make an array for the answers then just do a random swap or two and you have them in a random order but each is unique.

 

[FrostyCat]

The most common community book line for this is pushing into a list and then shuffling.

var list = ds_list_create();
ds_list_add(list, ans1correct, ans1wrong1, ans1wrong2, ans1wrong3);
ds_list_shuffle(list);
global.variableans1 = list[| 0];
global.variableans2 = list[| 1];
global.variableans3 = list[| 2];
global.variableans4 = list[| 3];
ds_list_destroy(list);