I need help

Write a program that uses a flag and does the following:

A) Ask the user to input a sentence containing parentheses

B) Display the sentence with the parentheses and their contents removed. Test the program with the following sentence as input: BASIC (Beginner's All-purpose Symbolic Instruction Code) was once the world's most widely known computer language

Show an attempt before asking for help. If you show your work, it will also let the mods which section to move this post to, since it is in the wrong forum.