Code in c++ please make a program that has two file one main.cpp and other .h header file 1. by means of a function, read data from text file calculate the score and letter grade. Request the function from main. State prototype in the header file. The text file also contains student name. 2. create structure to contain student info: like first,lastname, score,letter grade,test answer. 3. By using function open input file an output file and ask for their name for each.