Answer to Question #202193 in C++ for Myname

Question

Write a template function that returns the average of all the elements of an array. The arguments to the function should be the array name and the size of the array (type int). In main(), exercise the function with arrays of type int, long, double, and char.

Answer 1

#include <iostream>


using namespace std;


//a template function that returns the average of all the elements of an array. 
//The arguments to the function should be the array name and the size of the array (type int). 
template <typename T>
double average(T elements[], int size){
	double sum = 0;
	for (int i = 0; i < size; i++){
		sum += elements[i];
	}
	return sum/(double)size;
}
int main(){
	//In main(), exercise the function with arrays of type int, long, double, and char.
	int integers[] = {1, 2, 1, 4, 5};
	double doubles[] = {5.1, 5.5, 2.9, 1.7,8.45};
	long longs[] = {2147483, 456764, 132684, 4445,78754};
	char chars[] = {'a', 'b', 'c', 'd', 'e'};


	cout << "Average of integers: " << average<int>(integers, 5) << endl; 
	cout << "Average of doubles: " << average<double>(doubles, 5) << endl; 
	cout << "Average of long: " << average<long>(longs, 5) << endl;
	cout << "Average of chars: " << average<char>(chars, 5) << endl;

	system("pause");
}