Create Matrix in reverse spiral form

Matrix in reverse spiral form

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+#include <iostream>
+#define R 3
+#define C 6
+using namespace std;
+
+void ReversespiralPrint(int m, int n, int a[R][C])
+{
+	long int b[100];
+
+int i, k = 0, l = 0;
+
+	int z = 0;
+
+	int size = m*n;
+
+	while (k < m && l < n)
+	{
+	int val;
+
+		/* Print the first row from the remaining rows */
+		for (i = l; i < n; ++i)
+		{
+			// printf("%d ", a[k][i]);
+			val = a[k][i];
+			b[z] = val;
+			++z;
+		}
+		k++;
+
+		/* Print the last column from the remaining columns */
+		for (i = k; i < m; ++i)
+		{
+			// printf("%d ", a[i][n-1]);
+			val = a[i][n-1];
+			b[z] = val;
+			++z;
+		}
+		n--;
+
+		/* Print the last row from the remaining rows */
+		if ( k < m)
+		{
+			for (i = n-1; i >= l; --i)
+			{
+				// printf("%d ", a[m-1][i]);
+				val = a[m-1][i];
+				b[z] = val;
+				++z;
+			}
+			m--;
+		}
+
+		/* Print the first column from the remaining columns */
+		if (l < n)
+		{
+			for (i = m-1; i >= k; --i)
+			{
+				// printf("%d ", a[i][l]);
+				val = a[i][l];
+				b[z] = val;
+				++z;
+			}
+			l++;
+		}
+	}
+	for (int i=size-1 ; i>=0 ; --i)
+	{
+		cout<<b[i]<<" ";
+	}
+}
+
+/* Driver program to test above functions */
+int main()
+{
+	int a[R][C] = { {1, 2, 3, 4, 5, 6},
+					{7, 8, 9, 10, 11, 12},
+					{13, 14, 15, 16, 17, 18}};
+	ReversespiralPrint(R, C, a);
+	return 0;
+}