1. Create a program in c++ where users can enter product prices and quantities. Write entered product prices and quantities in the file which name will be file.txt like a check and then print the total amount. Also, print discount information which is 5 $ on 4 different products and total amount greater than 10 and 10 $ for 6 different products and total amount greater than 20.

2. Print all different words in the entered text.(in C++)

3. (in c++)Print all different words and each word count in entered text except articles (a, an, the) and other not special words(or, and, of and etc).