Dynamic array

Ricardo Azevedo Brandao · Ricardo Azevedo Brandao · commit b48dbbd3f657 · 2016-07-10T15:25:17.000-03:00
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@@ -1,79 +1,42 @@
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diff --git a/README.md b/README.md
@@ -30,4 +30,12 @@ Some basic differences between C and C++
  * `<vector>`
  * `const` instead `define`
  * `inline`
- 
+
+#### Dynamic Array
+Create multidimensional arrays dynamicaly
+
+* File:
+ * dyn-array.cpp
+* Subjects
+ * `new` and `delete` chuncks of memory
+ * pointers to array
diff --git a/dynamic-array/dyn-array.cpp b/dynamic-array/dyn-array.cpp
@@ -0,0 +1,43 @@
+//
+// This program shows an example to create multidimensional arrays in C++
+//
+// Especificaly in this example, you can see a 2D array.
+//
+
+#include <iostream>
+
+int main() {
+
+  // Defining dimensions
+  int N = 3;
+  int M = 3;
+
+  // Creating the matrix
+
+  double** mtrx = new double*[N];
+  for (int i = 0; i < N; ++i)
+    mtrx[i] = new double[M];
+
+  // Fill the matrix
+  
+  for (int i = 0; i < N; ++i)
+    for (int j = 0; j < M; ++j)
+      mtrx[i][j] = (double)(i) + ((double)(j)/100);
+
+  // Display the result
+
+  std::cout << '\n' << "---------------------------" << '\n';
+  for (int i = 0; i < N; ++i) {
+    for (int j = 0; j < M; ++j)
+      std::cout << mtrx[i][j] << '\t';
+    std::cout << '\n';
+  }
+
+  // Free memory
+  for (int i = 0; i < N; ++i)
+    delete [] mtrx[i];
+  
+  delete [] mtrx;
+
+  return 0;
+}
