Write a C++ program that will compute the area of a circle

Question

The program should restrict entry of letters and if a letter is input, it should display 'invalid input'

Answer 1

Benson Kazungu ,

▪︎before we are going to help you, please present your attempt here.
    if you haven't done a try by yourself so far, please do so. create your code in playground and post the link to it here.

▪︎please also provide a proper task description with sample of input and output.

▪︎if your question is related to a code coach exercise,  please mention the tutorial name and the exercise number.

thanks!

Answer 2

So what's your doubt here ?

Answer 3

Please take a look at the forum rules:
https://www.sololearn.com/Content-Creation-Guidelines/
https://www.sololearn.com/Discuss/1316935/?ref=app