Question

I have a maybe simple problem. I am going to generate 3 random numbers ranging from 0 to 2 and I want to determine if there are any duplicates.

Any ideas?

Answer 1

if (num1 == num2) {
}
else if (num1 == num3) {
}
else if (num2 == num3) {
}
else {
     //There are no dups.
}

Checks if there is a duplicate.

if (num1 == num2) {
     counter++;
}
if (num1 == num3) {
     counter++;
}
if (num2 == num3) {
     counter++;
}

This finds how many duplicates there are (for an added bonus).

EDIT:

For x amount of numbers you might want to do this (using 10 as my example amount of ints):

int counter = 0;
int i[10] = {
    1, 2, 3, 4, 5, 6, 7, 8, 9, 10
};

for (int g = 0; g < 10; g++)
{
    for (int j = g+1; j < 10; j++)
    {
        if(i[g] == i[j])
        {
            counter++;
            printf(@"%d\n", counter);
            //If this if statement is true then there is a dup... In this case none are found.
        }
    }
}