write a C program using GMP that encrypts, or, a text file. A command line flag should be used to determine whether an encryption or decryption is...

write a C program using GMP that encrypts, or, a text file. A command line flag should be used to determine whether an encryption or decryption is done. Assume that your public key is stored on a file named public.txt and your private key is stored in a file named private.txt. Name the program realrsa.c