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Hi can someone help me out the code "./generate 1000 50 | ./find 127" doesn't find the haystack. And I even removed the "./find 127" and went through the generated numbers but still didn't see the number "127"

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The "haystack" is the list of numbers. 127 is the "needle", and it's the 331st of the 1000 numbers, just verified using

./generate 1000 50|grep -nx "127"

grep searches the standard input or files for occurrences of a pattern. -n tells it to print line numbers, -x forces the whole line to match the pattern, so I don't get lines just containing 127.

So the "needle" 127 is in that "haystack".

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