Spiral Array C++ (#2234)

Spiral_Array/Spiral_Array.cpp

@@ -0,0 +1,83 @@
+// SPIRAL PRINTING 2-D matrix
+
+#include <iostream>
+using namespace std;
+
+int main()
+{
+    int m, n;
+    int left, right, top, bottom;
+    int i, j, count, dir;
+    int arr[100][100];
+
+    cin >> m >> n;  // Matrix of m*n
+
+    left = 0;
+    right = n-1;
+    top = 0;
+    bottom = m-1;
+
+    count = m * n;        // no. of elements
+    dir = 1;
+
+    for (i = 0; i < m; i++)	// Taking Inputs
+    {
+        for (j = 0; j < n; j++)
+            cin >> arr[i][j];
+    }
+
+    while (left <= right && top <= bottom && count > 0)
+    {
+        if (dir == 1)		// left to right
+        {
+            for (i = left; i <= right; i++)
+            {
+                cout << arr[top][i];	// Printing the topmost untraversed row
+                count--;
+            }
+            dir++;
+            top++;
+        }
+        if (dir == 2)		//top to bottom
+        {
+            for (i = top; i <= bottom; i++)
+            {
+                cout << arr[i][right];	// Printing the rightmost untraversed column
+                count--;
+            }
+            dir++;
+            right--;
+        }
+        if (dir == 3)		//left to right
+        {
+            for (i = right; i >= left; i--)
+            {
+                cout << arr[bottom][i];	// Printing the bottommost untraversed column
+                count--;
+            }
+            dir++;
+            bottom--;
+        }
+        if (dir == 4)		// bottom to top
+        {
+            for (i = bottom; i >= top; i--)
+            {
+                cout << arr[i][left];	// Printing the leftmost untraversed column
+                count--;
+            }
+            dir = 1;
+            left++;
+        }
+    }
+    return 0;
+}
+
+/* SAMPLE I/O
+Input
+3 3
+1 2 3
+4 5 6
+7 8 9
+Output
+1 2 3 6 9 8 7 4 5
+*/