// Pantea Aria


// static 2D arrays: similar to a Matrix

// Write a program that declares the following square 2D array of integers
//     {
//       {1, 0, -1},
//       {2, -2, 4},
//       {0, 5, 3}
//     }
// and prints the sum of all main diagonal elements with a function.
// The main diagonal runs from the top-left to the bottom-right.

// your turn: sum of all rows
// your turn: sum of all columns
// your turn: sum of all secondary diagonal elements (top-right to the bottom left)

#include <stdio.h>
int main(void) {
    int array[3][3] =  {{1, 0, -1}, {2, -2, 4}, {0, 5, 3}};
    int i = 0;
    
    while(i < 3) {
        int j = 0;
        int row_sum = 0;
        while(j < 3) {
            row_sum = row_sum + array[i][j];      
            j++;   
        }
        // what is row_sum?
        // it is the sum of all integers in row i
        printf("Sum of all int in row %d is %d\n", i, row_sum);
        i++;
    }
    
    return 0;
}