Programming Fundamental C++

Write a program that creates a "cryptogram" out of a string. A cryptogram is a message or word, where each actual letter is replaced with another letter. For example, the string - The birds name was squawk might be scrambled to - xms kbypo zhqs fho obrhfu The scrambling criteria should be devised by you, and should be fixed. E.g. in this example, T is scrambled to x, a is scrambled to h, etc. Note that upper and lower case letters are treated the same way, and spaces are not scrambled. Once scrambled, show the scrambled text to user and ask him for two characters. One would be the shown character and the other would be the real character