Question

Document2 Tell me ign Layout References Mailings Review View 1. Write a program called Lab18C that searches for a number in an array. T a. Write a bool function named search that receives 3 parameters: an int array, an int containing the length of the array, and an int number to search for. Return true if the number is in the array and false otherwise. b. Write a void function called fillArray with the array as a parameter that uses a for loop to read the text file (Lab18C.txt) 20 times and place the values in the array. c. In the main function, do the following: i. Declare an array of 20 integers. ii. Ask the user for a number to search for in the array iii. Call fillArray sending the array as a parameter. iv. Call the search function and send the array, the length of the array (20), and the search number as parameters. V. Print the search number and the value returned by the function along with appropriate label to say if the number was found or not. Focus

Answer 1

C++ Program:

#include <iostream>
#include <fstream>

using namespace std;

//Search function
bool search(int arr[], int len, int searchElement)
{
int i;

//Iterating over array
for(i=0; i<len; i++)
{
//Comparing elements
if(arr[i] == searchElement)
{
//Element found
return true;
}
}

//Element not found
return false;
}

//Fill array function
void fillArray(int arr[])
{
int i;

//Opening file for reading
fstream fin("Lab18c.txt", ios::in);

//Reading data from file
for(i=0; i<20; i++)
{
//Reading data in to array
fin >> arr[i];
}
}

//Main function
int main()
{
int arr[20]; //Declaring an array of 20 integers
int searchElement;
bool result;

//Reading search element
cout << "\n Enter element to search: ";
cin >> searchElement;

//Fill array
fillArray(arr);

//Calling search function
result = search(arr, 20, searchElement);

//Printing result
cout << "\n Searching for element " << searchElement << ", Value returned from function: " << result << "\n";

//Checking result
if(result)
{
cout << "\n\nElement Found...\n";
}
else
{
cout << "\n\nElement Not Found...\n";
}

return 0;
}

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Sample Run:

C:\TC\LAB18C\bin\Debug\LAB18C.exe Enter element to search: 23 Searching for element 23, Value returned from function: 1 Element Found... Process returned o (0x0) Press any key to continue. execution time : 1.731 s

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