My Echo
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Problem
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Take a variable number of unsigned integers [in a binary stream] from STDIN and output them to STDOUT.

Solution
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Uses fread to grab an array of numbers from the stream until the stream ends. During this, it uses a for loop to print every number from said array.

My Sort
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Problem
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Take a variable number of unsigned integers [in a binary stream] from STDIN and sort them using the quicksort algorithm, then output them to STDOUT.

Solution
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Firstly, we pull arrays of numbers using fread until we have all of them, putting them in our grand numbers array while we go. After this, we call an in-place recursive version of quicksort to sort the numbers, then output them to STDOUT.