Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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5. Write a function which will find the average of all elements of an array of integers. Pass an array and a dimension (the number of elements), and return the value of the average as a float ( the return value). Test this function in the main program with the array: 5, 7, 3, 5, 6, 4.

Expert Solution
Step 1

A function which will find the average of all elements of an array of integers.

float average(int array[], int dimension)

{

    //declare local variable avg of float type

    float avg;

    //declare integer type variable sum

    int sum=0;

    //for loop run until dimension

    for(int i=0; i<dimension; i++)

    {

        //compute sum

        sum=sum+array[i];

    }

    //compute average

    avg=sum/dimension;

    //retrun avg

    return avg;

   

}

Step 2

The following program is written in the C++ programming language.

Program:

//included header file

#include <iostream>

//included namespace

using namespace std;

//function which will find the average

float average(int array[], int dimension)

{

    //declare local variable avg of float type

    float avg;

    //declare integer type variable sum

    int sum=0;

    //for loop run until dimension

    for(int i=0; i<dimension; i++)

    {

        //compute sum

        sum=sum+array[i];

    }

    //compute average

    avg=sum/dimension;

    //retrun avg

    return avg;

   

}

//main function

int main ()

{

    //declared array with given elements

    int array[]={5, 7, 3, 5, 6, 4};

    //declared flaot type variable avg

    float avg;

    //declared variable dimension of integer type

    int dimension=6;

    //calling function average

    avg=average(array, dimension);

    //print average of all elements of an array of integers

    cout<<"The average of all elements of an array of integers is:"<<avg;

    return 0;

}

 

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