Need help pls. , What is wrong with my program? What should I do? Why there's an Error?

Question

https://code.sololearn.com/cnQOed9oplNo/?ref=app

Answer 1

https://www.sololearn.com/Discuss/2068530/?ref=app

Answer 2

Nothing wrong but you repeat using scanf more than three time for the some variable age.Use it only once after age declaration.