cp3_3

#include <stdlib.h>
#include <stdio.h>
#include <time.h>

#define RAND(a,b) (a + rand() % (b - a))

int sum_row(int **x, int n, int i)
{
    int j, sum = 0;
    for (j = 0; j < n; j++)
        sum += x[i][j];
    return sum;
}

int check(int **x, int n)
{
    int i;
    for (i = 0; i < n; i++)
        if (sum_row(x, n, i) % 2 == 0)
            return 0;
    return 1;
}

int main()
{
    srand(time(NULL));
    int **x, n, i, j, k, sum_main = 0, sum_side = 0;

    printf("Size (n*n) = ");
    scanf("%d", &n);

    x = (int **)malloc(n*sizeof(int *));
    for (i = 0; i < n; i++)
        x[i] = (int*)malloc((n + 1)*sizeof(int));

    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            x[i][j] = RAND(0, 10);
            printf("%d ", x[i][j]);
        }
        printf("= %d", sum_row(x, n, i));
        printf("\n");
    }

    if (check(x, n) == 1)
    {
        printf("All lines have odd sums\n");
        return 0;
    }

    for (i = 0; i < n; i++)
    {
        for (j = 0; j < n; j++)
        {
            if (i == j)
                sum_main += x[i][j];
            if (i + j == n - 1)
                sum_side += x[i][j];
        }
    }

    k = 0;
    for (i = 0; i < n; i++)
    {
        if (sum_row(x, n, i) % 2 == 0)
        {
            for (j = 0; j < n; j++)
                x[k][j] = x[i][j];
            k++;
        }
    }
    x = (int **)realloc(x, k*sizeof(int *));

    for (i = 0; i < k; i++)
    {
        if (i % 2 == 0)
            x[i][n] = sum_main;
        else
            x[i][n] = sum_side;
    }

    for (i = 0; i < k; i++)
    {
        printf("\n");
        for (j = 0; j <= n; j++)
            printf("%d ", x[i][j]);
    }

    free(x);
    return 0;
}