Write a program that reads a C program and prints in alphabetical order each group of variable names that are identical in the first 6 characters, but different somewhere thereafter. Don't count words...

Write a program that reads a C program and prints in alphabetical order each

group of variable names that are identical in the first 6 characters, but different somewhere

thereafter. Don't count words within strings and comments. Make 6 a parameter that can be

set from the command line.