#include <iostream>

using namespace std;

int max(int a[], int size) {
    int max_item;

    // make sure there are items in the array
    if(size>0) {
        // First item is the max.
        max_item=a[0];

        // Check all the other items if they are higher than the max value.
        for(int i=1;i<size;i++)
            if(a[i]>max_item)
                max_item=a[i];
    }

    return max_item;
}

int main () {
    int a[]={5,3,9,2,1};

    int maxFound;

    maxFound=max(a,5);

    cout << maxFound << endl;

    return 0;
}