Write a function to solve quadratic equations of the form and use this function in a test program that prompts user to enter values for a, b, and c and displays the result. Make good use of pass by...

Write a function to solve quadratic equations of the form and use this function in a test program that prompts user to enter values for a, b, and c and displays the result. Make good use of pass by reference and pass by value concept. Write a C++ program to read lines from a user-named input file and then convert all the characters to uppercase and write the converted output the user-named output file.