Makefile prompts “/bin/sh: -c: line 3: syntax error near unexpected token `then” solution!

The result after make run, the result of the first paragraph, the result of the second paragraph is after adjustment!
Screenshots of Makefile’s code:
In the end, the reason was clear because the code written in Notepad on Windows first, although also used the <tab> key, still There is a problem. After re-editing it once in NetBeans, this problem is solved, and then the next problem is the next problem: the omission of the delimiter . stop. Continue to analyze next time.
