Your program will read in a file name from cin. it will then open the input file. your program must also open an output file called saleschart. txt. you will write the bar char headings and data to this file. your program needs to have the following general flow: read in the file name open the input file for this file name display a message if the input file does not open and quit your program open the output file ("saleschart. txt") display a message if the output file does not open, close the input file, and quit your program while (readfile into store number and sales for store display an error if the store number or sales are invalid if the data is good output the bar char to the output file end while close the input and output files the processing loop will read the input data and process it until it gets and end of file indication from the file read operation assuming you have read in valid data and this is the first sales data being processed your program should output some headings to the output file before processing the data. the headings are as follows: