Hello, I can't write this program in C++. Please help, preferably without any vector<double>... something stuff. Thank you.

Question

Write a program to read an arbitrary-length list of scores between 1 and 99 from a text file named
scores.txt. After reading the scores, your program must analyze all of them, determine the average
score and print statistics about the number of scores less than or equal to that average and the number
of scores above it. The following is a sample output of the program:
Average: 68
Below average: 32 scores
Above average: 78 scores

Answer 1

Ok so your program needs to be able to process a file that can have any number of scores in it. Maybe 2, maybe 2 millions.

Interestingly, C++ does have a data type which can handle data whose size you don't know upfront.
https://www.mygreatlearning.com/blog/vectors-in-c/
"Vectors in C++ are sequence containers representing arrays that can change their size during runtime."

So my question is, why do you want to avoid using the most suitable tool?
Besides the scores seem to be integers, so luckily you can use a vector<int> instead of a vector<double> 😊
Maybe you can get away without using "something stuff", at least I don't know that library anyway 😜

Answer 2

Maybe an idea. Open the file and read the numbers one by one, only to calculate how many numbers there are. While you are doing this you can also calculate the total sum of all numbers. So after processing the file, you have a count and a sum variable. From this you can calculate the average.
Then open the file again (or just reset the file if it's still open) and read all values again one by one, and this time you keep track how many scores are below and above average. This way you don't even have to store the actual numbers in memory (in array or vector).

https://cplusplus.com/reference/istream/istream/seekg/

Answer 3

Will try. Thanks

Answer 4

The task is not to use vectors (