Question

Write out C++ code for the following: Declare a templated function that has a return type of T". It has two parameters: An array of T items named arr, and an integer named size. This function is assumed to work with numerical data types. Within the function, create a new T variable named sum and initialize it to 0. Use a for-loop to go from 0 (inclusive) to size (exclusive), adding each element from arr to the sum. Finally, return the value of sum after the for-loop has finished.

Answer 1

PROGRAM

// I am taken array size 10 if want increase this using pointers or array size

#include <iostream>
using namespace std;
  
template <class T, int max> // Create Template object and integer number
T sum(T arr[], int size) // Create template function with two arguments
{
T m = max; // Declare integer variable and store the template argument max
T s=0; // Declare and assign sum of Template variable
for (int i = 0; i < size; i++){
m = arr[i]; // assign array elements to template second argument max
s+=m; // calculate sum of array elements
}
  
return s; // return template sum
}
  
int main()
{
int arr[10]; // Declare integer array variable arr
float a[10]; // Delcare float array variable a
int n; // Declare integer n
cout<<"\nEnter the Size of an Array: ";
cin>>n;
cout<<"\nRead integer Array elemnts\n";
for(int i=0;i<n;i++)
cin>>arr[i]; // Read integer array
  
cout<<"\nRead Float Array elemnts\n";
for(int i=0;i<n;i++)
cin>>a[i]; // REad float array
  
cout <<"\nSum of Integer Array Elements: "<<sum<int, 1000>(arr, n) << endl; // call function sum() and print sum of integer array elements
cout <<"\nSum of Float Array Elements: "<<sum<float, 1000>(a, n) << endl; // call function sum() and print sum of float array elements
return 0;
}

OUTPUT

Enter the Size of an Array: 5

Read integer Array elemnts
10
20
35
48
96

Read Float Array elemnts
10.52
12.63
20.56
42.36
85.36

Sum of Integer Array Elements: 209

Sum of Float Array Elements: 171.43