CS161, C++ using QTCreator, Assignment 8: Stock Statistics

Question

You will be writing various functions to help calculating information about the stock and its performance, as well as to read in data about a stock. These functions need to be able to work on arrays of different sizes and with different values.

here is the stock tester.cpp tests:

#include

#include

using namespace std;

#include "stockFunctions.h"

const int TEST_ARR1_SIZE = 5;

const double TEST_ARR1[TEST_ARR1_SIZE] = {12.25, 12.15, 12.17, 12.20, 12.06};

TEST_CASE( "highestValue" ) {

cout << "1: highestValue" << endl;

CHECK( highestValue(TEST_ARR1, 1, 3) == Approx(12.20) );

}

TEST_CASE( "average" ) {

cout << "2: average" << endl;

CHECK( average(TEST_ARR1, 1, 3) == Approx(12.173333) );

}

TEST_CASE( "standardDev" ) {

cout << "3: standardDev" << endl;

CHECK( standardDev(TEST_ARR1, 1, 3) == Approx(0.0205480) );

}

TEST_CASE( "getData" ) {

cout << "4: getData" << endl;

const int TEST_ARR2_SIZE = 4;

double TEST_ARR2[TEST_ARR2_SIZE];

stringstream input("1.1 12.3 4.6 -1.0");

getData(input, TEST_ARR2, TEST_ARR2_SIZE);

CHECK( TEST_ARR2[0] == Approx(1.1) );

}

TEST_CASE( "calculateChangeArray" ) {

cout << "5: calculateChangeArray" << endl;

//Initialize the changes with obviously bad values

double changes[TEST_ARR1_SIZE] = {-99, -99, -99, -99, -99};

calculateChangeArray(TEST_ARR1, changes, TEST_ARR1_SIZE );

CHECK( changes[1] == Approx(-0.1) );

}

TEST_CASE( "maxDrawdown" ) {

cout << "6: maxDrawdown" << endl;

const int TEST_ARR2_SIZE = 7;

const double TEST_ARR2[TEST_ARR2_SIZE] = {10.0, 6.0, 20.0, 12.0, 13.0, 11.0, 17.0};

CHECK( maxDrawdown(TEST_ARR2, 0, 6) == Approx(-9) );

}

I need help with functions to test against these, and proper functions in general, thank you!

Answer 1

Here's the first one to get you started:

double highestValue(double arr[], int start, int end) {

double highest = DBL_MIN;

while (start <= end) {

highest = max(highest, arr[start]);

start++;

}

return highest;

}

Hopefully this gives you an idea of how to do the others.