[SOLVED] Problem using gets()

Question

I am trying to make a c program to change case of letters in a string using functions from string.h header file. I've used gets() to take string input. A popup box for taking input should come when I run the code in code playground. But it isn't coming.
What's the problem with the code?
Thanks in advance.
https://code.sololearn.com/ckkGl7HSb9Dz/?ref=app

Answer 1

Use @kurwius technique or place "cin>>" after the return 0 line of your main
Of course gets is supported !