10. Vectors

Index

• Exercise
  • Objective
  • Task
  • Steps
• C++ theory

Exercise 10: Statistical Analysis of Numbers

Objective

Understanding vectors and getting used to .h files.

Task

In this exercise, you'll write a program that reads a list of numbers from a file, stores them in a vector, and then calculates and outputs the following statistics:

• Mean (Average)
• Median
• Mode

Steps

• Reading the Numbers: Read all the numbers from a file into a std::vector. Ensure the file exists and is not empty. Handle any potential errors (e.g., non-numeric data).

• Calculating the Statistics:

  • Mean: Calculate the average of the numbers.
  • Median: Find the middle value when the numbers are sorted. If there’s an even number of values, the median is the average of the two middle numbers.
  • Mode: Identify the number that appears most frequently. If there is a tie for the most frequent number, return all of them.

• Output the Results: Display the mean, median, and mode(s) to the user.

C++ theory