I have a file with random numbers in it called "data.txt". Each line in data.txt has a number of varying sizes. I would like to know how to open this file and read its contents line by line into my code in a different tab. The code in my other tab ordinarily prompts the user to enter random numbers manually, so the data.txt file would act to simplify the process by allowing the code to just read the file and then produce a result.

C programming language please

thank you!