Problem Solving with C++ (9th Edition)
Problem Solving with C++ (9th Edition)
9th Edition
ISBN: 9780133591743
Author: Walter Savitch
Publisher: PEARSON
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Textbook Question
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Chapter 17, Problem 1P

Write a function template for a function that has parameters for a partially filled array and for a value of the base type of the array. If the value is in the partially filled array, then the function returns the index of the first indexed variable that contains the value. If the value is not in the array, the function returns −1. The base type of the array is a type parameter. Notice that you need two parameters to give the partially filled array: one for the array and one for the number of indexed variables used. Also, write a suitable test program to test this function template.

Expert Solution & Answer
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Program Plan Intro

Program plan:

  • The function template “search” is defined with the three parameters.
    • Inside the function definition, the “for” condition will iterate until the “i” value is less than “num” value.
      • If “a[i]” is equal to “v” then return “i”, otherwise return -1.
  • Define the main function.
    • Declare the required variables and assign the value for those variables.
    • Call the “search” function with the arguments.
    • Check “i” is equal to “-1” or not.
      • If the condition is true, display the search value is not found. Otherwise display the search element position.
Program Description Answer

The program is used to find the search element in the given array is as follows:

Explanation of Solution

Program:

//include the necessary header file

#include<iostream>

using namespace std;

//definition of template

template<typename T>

//definition of "search" function

int search(T a[], int num, T v)

{

  //check the condition

  for(int i = 0; i < num; i++)

        //check the condition

        if(a[i] == v)

            //return "i" value

            return i;

    //return "-1" value

    return -1;

}

//definition of main function

int main()

{

    //declare and assign the array value

    int a[20] = {1, 2, 4, 9, 3, 7, 6, 5, 10, 15};

    //declare and assign the value

    int num = 10;

    int v = 6;

    //declare and call the function

    int i = search(a, num, v);

    //check the condition

    if(i == -1)

        //display the result

        cout<<v<<" is not found in the array\n";

    else

        //display the result

        cout<<v<<" found at index "<<i<<"\n";

    //return statement

    return 0;

}

Sample Output

Output:

6 found at index 6

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Definition of Array; Author: Neso Academy;https://www.youtube.com/watch?v=55l-aZ7_F24;License: Standard Youtube License