#include <iostream>
using namespace std;
 
int for_soe2(int A[], int n) {
	return 0;
}
int for_soe(int A[], int n) {
	return 0;
}
int for_soe1(int A[], int n) {
	return 0;
}
 
int sum_of_elements(int A[], int n) {
	int sum = 0;
	while(--n) {
		sum += A[n];
	}
 
	return sum;
}
 
int main() {
	int A[] = {1, 2, 3};
	int n = 3;
 
	std::pair<int (*)(int A[], int n), string> checks[] = {
		{for_soe2, "That's array don't have any zero elements!"},
		{for_soe  , "The last element is zero!" 			    },
		{for_soe1 , "Zero element was penultimate!" 			},
	};
 
	for(auto const& check: checks) {
		if(check.first(A, n) == 0)
			cout << check.second << endl;
	}
 
    cout << "Sum of the elements: " << sum_of_elements(A, n) << endl;
 
	return 0;
}

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