Heap memory for matrix and elapsed time

utils/utils.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+
+double **create_matrix(int rows, int cols) {
+  int i;
+  double **x;
+  
+  x = (double **) malloc(rows * sizeof(double));
+  for (i = 0; i < rows; i++) {
+    x[i] = (double *) malloc(cols * sizeof(double));
+  }
+  return x;
+}
+
+void destroy_matrix(double **x, int rows) {
+  int i;
+
+  for (i = 0; i < rows; i++) {
+    free(x[i]);
+  }
+  free(x);
+}
+
+void print_matrix(double **x, int rows, int cols) {
+  int i, j;
+  for (i = 0; i < rows; i++) {
+    for (j = 0; j < cols; j++) {
+      printf("%f\t", x[i][j]);
+    }
+    printf("\n");
+  }
+  fflush(stdout);
+}

utils/utils.h

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+/* #define ENABLE_LOG */
+
+#ifdef ENABLE_LOG
+#  define LOG(x) x
+#else
+#  define LOG(x) (void) 0 
+#endif
+
+typedef struct borders {
+  double north;
+  double east;
+  double south;
+  double west;
+} borders;
+
+double **create_matrix(int rows, int cols);
+
+void print_matrix(double **x, int rows, int cols);
+void destroy_matrix(double **x, int rows);