SOLVED Random result from 3 or more different options?

[Gasil]

Hello, I'm trying to figure out a simple way to to this, but I don't think I could without help.

I have these three outcomes or accidents while performing activities, each one has a different chance to occur: 20%, 30% and 50%, so I want a check to determine which will happen over the other two based on its probability.

How would you code something like that? I have no code whatsoever other than:

//Check if accident will happen.
roll = irandom(99);
if(roll < BASE_ACCIDENT_CHANCE)
{
    //Check which of the 3 different incidents will happen.
}

Thank you for your suggestions.

 

[RefresherTowel]

Well, it's easy enough to simply do another roll right?

//Check if accident will happen.
var roll = irandom(99);
if(roll < BASE_ACCIDENT_CHANCE)
{
   //Check which of the 3 different incidents will happen.
   var roll = irandom(99);
   if (roll < 20) {
      // 20% chance
   }
   else if (roll < 30) {
      // 30% chance
   }
   else if (roll < 50) {
      // 50% chance
   }
}

 

[Gasil]

Well, it's easy enough to simply do another roll right?

//Check if accident will happen.
var roll = irandom(99);
if(roll < BASE_ACCIDENT_CHANCE)
{
   //Check which of the 3 different incidents will happen.
   var roll = irandom(99);
   if (roll < 20) {
      // 20% chance
   }
   else if (roll < 30) {
      // 30% chance
   }
   else if (roll < 50) {
      // 50% chance
   }
}

Thank you, friend, the "cascade" effect was messing me up, I thought in that way one incident would have greater chances to happen than defined, but it's clearer now the way you wrote it. Thanks again, appreciate it.

 

[chamaeleon]

@RefresherTowel You need to add 20 and 30 for 30% and 50% can be a plain else.

 

[RefresherTowel]

@RefresherTowel You need to add 20 and 30 for 30% and 50% can be a plain else.

True that.

 

[DaveInDev]

Hello, I'm trying to figure out a simple way to to this, but I don't think I could without help.

I have these three outcomes or accidents while performing activities, each one has a different chance to occur: 20%, 30% and 50%, so I want a check to determine which will happen over the other two based on its probability.

looking at 20+30+50 = 100, it seems that once you decided there is an accident, we have to choose at least one (like in a wheel of fortune), so I would rather do the check like this :

   var roll = irandom(99);
   if (roll < 20) {
      // 20% chance
   }
   else if (roll < 20+30) {
      // 30% chance
   }
   else if (roll < 20+30+50) {
      // 50% chance
   }

which can be of course simplified by :

   var roll = irandom(99);
   if (roll < 20) {
      // 20% chance
   }
   else if (roll < 20+30) {
      // 30% chance
   }
   else  {
      // 50% chance
   }