Simple Function Template Array Program Example : Search Number in C++

Generic Programming

Templates are a feature of the C++ programming language that allows functions and classes to operate with generic types

Function Template Definition

A function template behaves same as normal function except that the template works with different data types.

Function Template Syntax

template <class identifier> function_declaration;
template <typename identifier> function_declaration;

templete_identifier fn_name(templete_identifier .. args) {
 return ...
}

Example Program

// Header Files
#include <iostream>
#include<conio.h>
#include<stdlib.h>

#define MAX_SIZE 5

using namespace std;

// Template Declaration

template<class T>

// Generic Template Function for Search
T getSearch(T x[], T element) {
    int i;

    cout << "\nYour Data   :";
    for (i = 0; i < MAX_SIZE; i++) {
        cout << "\t" << x[i];
    }

    /* for : Check elements one by one - Linear */
    for (i = 0; i < MAX_SIZE; i++) {
        /* If for Check element found or not */
        if (x[i] == element) {
            cout << "\nFunction Template : Element  : " << element << " : Found :  Position : " << i + 1 << ".\n";
            break;
        }
    }

    if (i == MAX_SIZE)
        cout << "\nSearch Element : " << element << "  : Not Found \n";
}

int main() {

    int arr_search[MAX_SIZE], i, element;
    float f_arr_search[MAX_SIZE], f_element;

    cout << "Simple Function Template Array Program Example : Search Number\n";
    cout << "\nEnter " << MAX_SIZE << " Elements for Searching Int : " << endl;
    for (i = 0; i < MAX_SIZE; i++)
        cin >> arr_search[i];

    cout << "\nEnter Element to Search (Int) : ";
    cin>>element;

    // Passing int Array to Template Function
    getSearch(arr_search, element);

    cout << "\nEnter " << MAX_SIZE << " Elements for Searching Float : " << endl;
    for (i = 0; i < MAX_SIZE; i++)
        cin >> f_arr_search[i];

    cout << "\nEnter Element to Search (Float) : ";
    cin>>f_element;

    // Passing int Array to Template Function
    getSearch(f_arr_search, f_element);

    getch();

    return 0;
}

Sample Output

Simple Function Template Array Program Example : Search Number

Enter 5 Elements for Searching Int :
56
34
100
23
90

Enter Element to Search (Int) : 23

Your Data   :   56      34      100     23      90
Function Template Search : Element  : 23 : Found :  Position : 4.

Enter 5 Elements for Searching Float :
45.23
89.01
90.67
100.89
23.90

Enter Element to Search (Float) : 23.90

Your Data   :   45.23   89.01   90.67   100.89  23.9
Function Template Search : Element  : 23.9 : Found :  Position : 5.

How It Works

This C++ program demonstrates Simple Function Template Array Program Example : Search Number. It first reads the required values as input, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Iterate over the data using a loop to apply the logic.
4. Use conditional statements to handle the different cases.
5. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Continue learning with these related tutorials and programs:

• OOP Programs — Browse all OOP Programs.
• Templates in C++ — Concept — function and class templates.
• Simple Class Template Program Example Get Maximum Number — More in templates in c.
• Simple Class Template Array Program Example : Search Number — More in templates in c.