11-arrays

Exercises 11 - Arrays:

Part 1

Goal

Output:How many numbers do you want to give me?
Input:5
Output:Okay, I'm listening...
Input:12
Input:5
Input:3
Input:7
Input:3
Output:What number are you looking for?
Input:5
Output:I found that number 1 times!
Output:What number are you looking for?
Input:11
Output:I found that number 0 times!
Output:What number are you looking for?
Input:3
Output:I found that number 2 times!

Instructions

• Create a Console Project named P11_1Arrays
• Ask the user, how many numbers he'd like to input.
• Create an array of that size.
• For each of the array's indices from 0 until Length (exclusive), do:
  • read input from the console
  • cast it to be a number
  • assign it to one of the slots of the array
• Continue asking the user, what number he's looking for.
  • Read the input from the console
  • Cast it to be a number
  • Count, how often that number exists in the array.
    • You can start counting at 0
    • You can iterate over all elements like you did before (when filling it)
    • Then, if the number is the same, you can increase the count by 1
  • Print the count to the console

Need Help? Here's The Slides!

Part 2

Goal

Output:I will roll 10.000 numbers between 0 and 10:
Output:I rolled 0 a total of 987 times.
Output:I rolled 1 a total of 1002 times.
Output:I rolled 2 a total of 998 times.
...

Instructions

• Create a Console Project named P11_2Arrays
• Create an array to count the occurrences of random numbers
• roll 10.000 times for a number between 0 and 10
• and count the number of times that you have rolled that specific number
• Afterwards, print the result to the console.

Toggle, if you're stuck

An array of Type int can be used to store n numbers. e.g. an array of size 5 can store 5 numbers. The indices of that array are: 0, 1, 2, 3, 4.

Basically, the array will look like this:

• 0: 0
• 1: 0
• 2: 0
• 3: 0
• 4: 0

Now, if I roll a 4, I can simply increase the number at array index 4 by one array[4]++;:

• 0: 0
• 1: 0
• 2: 0
• 3: 0
• 4: 1

When I repeat that a few times, I should end up with an array looking something like this:

• 0: 100
• 1: 83
• 2: 97
• 3: 102
• 4: 123

Now, I can use a for loop to iterate over that array and print the index i and the number at each index array[i] to the console.

Need Help? Here's The Slides!