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C++ Taskbook Level 5.4

Given some integer:

int num = 12345;

Check that the digits of this number are in ascending order.

Given some array:

int arr[] = {123, 456, 789};

Get an array of the first digits of the numbers in the first array:

int[] {1, 4, 7};

Create the following array using loops:

char[] {
	{'x', 'x', 'x'},
	{'x', 'x', 'x'},
	{'x', 'x', 'x'},
}