TPS 9: Functions II

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//==============================================================================
// File:    lecture6-normalize.cpp
// Author:  CSC160 class
// Date:    29-Mar-2021
// Purpose: Reads a list of real numbers from the user and scales them using
//          min-max normalizations.
//==============================================================================
#include <iostream>
#include <vector>
using namespace std;

/**
 * Finds the min and max values in the given vector.
 * 
 * @param numbers A list of real numbers.
 * @param min A variable to hold the min value from numbers in (gets updated).
 * @param max A variable to hold the max value from numbers in (gets updated).
 */
void FindMinMax(vector<double> numbers, double &min, double &max){
    if(numbers.size() > 0){
        min = numbers.at(0);
        max = numbers.at(0);
    }

    // Find the min and max values in the vector.
    for(unsigned int i = 0; i < numbers.size(); i++){
        if(_______ < min){
            min = numbers.at(i);
        }
        ____(numbers.at(i) > max){
            max = numbers.at(i);
        }
    }
}


/**
 * Scales each of the values in the given vector so that it is between 0 and 1.
 * Uses min-max normalization for scaling.
 * 
 * @param numbers A list of real numbers to scale (gets updated)
 */
void Scale(____________){
    double min, max;
    // Find the min and max.
    _________(numbers, min, max);

    // Scale.
    for(unsigned int i = 0; i < numbers.size(); i++){
        _________ = (numbers.at(i)-min)/(max-min);
    }
}

/**
 * Reads a list of real numbers from the user and scales them using min-max 
 * normalizations.
 * 
 * @return The program's exit status (0 is good).
 */
int main(){
    vector<double> numbers;
    double number;

    cout << "Enter as many floating point numbers as you'd like; "
         << "enter STOP to stop:" << endl;

    // Read in all of the doubles until there's an error reading a value in
    // (we'll use that error as the implicit sentinel value).
    cin >> number;
    while(cin.good()){
        numbers.push_back(number);
        cin >> number;
    }

    // Scale the values.
    ____________;

    // Print.
    for(unsigned int i = 0; i < numbers.size(); i++){
        cout << numbers.at(i);

        // Only print a comma if this isn't the last number in the vector.
        if(i < __________){
            cout << ", ";
        } 
    }
    cout << endl;

    return 0;
}