Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Array
The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.
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double median() //Before calculating the median, we must sort the //array. //If the array is even... if (numbers.size() % 2 -- 0) { //Get the mid index int mid - numbers.size()/ 2; //Get the two numbers in the mid. (mid is the i ndex of the right most middle number.) //Get mid ar'd mid - 1 double numl - numbers [mid]; double num2 = numbers [mid - 1]; //Calculate the average of the two middle numbe rs and return //the average. return average_mid; else //Determine the median index and return the //number at the median. int mid - numbers.size() /2; return numbers [mid]; } //Sorts the array in ascending order. void BubbleSort) for (int i - 0; i < numbers.size(); i++) { bool swapped false; for (int j - 0; j< numbers.size() - i - 1; j++ { if (numbers[j] > numbers[j + 1] swap(numbers[), number s[j + 11); swapped - true; if (swapped -- false) return; } private: //Used only in Bubble Sort. Ignore... void swap(double& a, double& b) { double temp- a; a - b; b - temp; }; int main) VCreate a StatSet variable called "s". //Add the number "55" to the StatSet "s". //Calculate the median of the numbers. return 0; PIC CO
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Transcribed Image Text:double median() //Before calculating the median, we must sort the //array. //If the array is even... if (numbers.size() % 2 -- 0) { //Get the mid index int mid - numbers.size()/ 2; //Get the two numbers in the mid. (mid is the i ndex of the right most middle number.) //Get mid ar'd mid - 1 double numl - numbers [mid]; double num2 = numbers [mid - 1]; //Calculate the average of the two middle numbe rs and return //the average. return average_mid; else //Determine the median index and return the //number at the median. int mid - numbers.size() /2; return numbers [mid]; } //Sorts the array in ascending order. void BubbleSort) for (int i - 0; i < numbers.size(); i++) { bool swapped false; for (int j - 0; j< numbers.size() - i - 1; j++ { if (numbers[j] > numbers[j + 1] swap(numbers[), number s[j + 11); swapped - true; if (swapped -- false) return; } private: //Used only in Bubble Sort. Ignore... void swap(double& a, double& b) { double temp- a; a - b; b - temp; }; int main) VCreate a StatSet variable called "s". //Add the number "55" to the StatSet "s". //Calculate the median of the numbers. return 0; PIC CO
#include <iostream> #include <vector> using std::cout; using std::vector; class StatSet { private: HCreate a vector of doubles that is called "numbers." public: //Nothing to do in the constructor. StatSet() } // Add a new number to the set. vòid add_num(double num) { } double mean() { //Sum up the values and return the average. double sum = 0; //Write a loop that would iterate through the vector. sum += numbers[i]; return sum / numbers.size(); } double median() //Before calculating the median, we must sort the //array.
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Transcribed Image Text:#include <iostream> #include <vector> using std::cout; using std::vector; class StatSet { private: HCreate a vector of doubles that is called "numbers." public: //Nothing to do in the constructor. StatSet() } // Add a new number to the set. vòid add_num(double num) { } double mean() { //Sum up the values and return the average. double sum = 0; //Write a loop that would iterate through the vector. sum += numbers[i]; return sum / numbers.size(); } double median() //Before calculating the median, we must sort the //array.
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