Reference no: EM132432103

Write a function called readFloatMap that reads from a text file, stores its contents in a 2D array, and returns the number of lines it reads.

• Your function should be named readFloatMap
• Your function should take three parameters in the following order:
• A string fileName
• A 2D array of doubles with 4 columns double arr[][4]
• The int number of rows of the given array
• Your function will open and read the file specified by the fileName parameter. This string should include both the name and extension of the file (what type of file it is). There are some good and bad examples below:
• Good: "books.txt"
• Bad: "authors"
• Your function should read the file line by line. Each line contains 4 floating point numbers which should be stored in the corresponding columns of the 2D array.
• If your function has added any rows to the array (meaning that the specified file exists and could be read), it should return the number of rows added to the array.
• If the file does not exist, return -1.
• Your function does not print anything