Thread: Generating random number from set

The problem asks me to write a c statement that will assign an int variable a random number from [25, 50, 75, 100]

I am thinking of using rand() but I'm not sure how

perhaps?
for (int i = 0; i <=100;i*2)
int random_number=rand(i);

I'm not even sure that's allowed

I would put your set in an array:

Code:

 int set[] = { 25, 50, 75, 100 };

Then you can use your rand() result as an index into set:

Code:

 int random_number = set[<random number between 0 and 3 inclusive>];

itsme86's suggestion is a more general solution, but in this case you can map the integers in the range [0, 3] to those numbers by a simple formula, e.g., ((rand() % 4 + 1) * 25).