/**
 * 2D Vector Sum
 * CS 2240
 * University of Vermont
 * Clayton Cafiero
 * 2020-Jun-26
 */

#include <vector>
#include <iostream>
#include "randi.h"

#define SIZE 100
#define RANGE 10

/**
 * Calculate the sum of all elements in a 2D array
 * @param a std::vector<std::vector<int>>
 * @return int
 */
int twoDArraySum(std::vector<std::vector<int>> a) {
    int result = 0;
    for (int i = 0; i < a.size(); i++) {
        std::vector<int> row = a[i];
        for (int j = 0; j < a[i].size(); j++) {
            result = result + row[j];
        }
    }
    return result;
}


int main() {
    std::vector<std::vector<int>> twoDArray;

    std::vector<int> a = {1, 1, 1, 1};
    twoDArray.push_back(a);
    twoDArray.push_back(a);
    twoDArray.push_back(a);
    twoDArray.push_back(a);

    int result = twoDArraySum(twoDArray);
    assert(result == 16);

    // Create a 2D vector of random integers
    // This will be a SIZE x SIZE vector
    // Integer values will be between -RANGE and RANGE
    for (int i = 0; i < SIZE; i++) {
        std::vector<int> a;
        // populate array with SIZE random integers between -RANGE and RANGE
        randPopulateArray(a, SIZE, RANGE);
        twoDArray.push_back(a);
    }
    result = twoDArraySum(twoDArray);

    std::cout << result << std::endl;

    return 0;
}