Untitled

#include <iostream>
#include <cmath>
#include <cstdio>
#include <cstdlib>

using namespace std;

// Q1. 

// a) Write a function called max_array(p,n) where
// p is a pointer to a 1D array of doubles and n is the number 
// of elements in the array.  The function returns
// the maximum element of the array.

double max_array(double *p, int n);

// b) Write a main() to illustrate the function from part a) for
// a 1D array with five elements given by: 1.1, 2, -3, 6, 4.5

int main() 
{ 
	int n = 5;
	double A[5] = { 1.1, 2, -3, 6, 4.5 };
	double max_A;

	max_A = max_array(A,n);

	cout << "\nmax_A = " << max_A;

	cout << "\n\ndone.\n";
	getchar();

	return 0;
}

double max_array(double *p, int n)
// the function sets p = A for this example
{
	int i;
	double ans;
	
	ans = -1.0e100;
//	ans = p[0]; // alternative
	for(i=0;i<n;i++) {
		if( p[i] > ans ) ans = p[i];
		// alternative using pointer notation
//		if( *(p + i) > ans ) ans = *(p + i);
	}
	
	return ans;
}