Add main program for Message Queue

Message Queue(Circular Queue)/MessageQueue-main.c

@@ -0,0 +1,36 @@
+#include "MessageQueue.h"
+
+int main()
+{
+  int choice;
+  char message[100];
+  queue q;
+  q.front = q.rear = -1;
+  while(1)
+  {
+    printf("Current Queue: ");
+    display(&q);
+    printf("\n Front = %d Rear = %d", q.front, q.rear);
+    printf("\n 1. Enqueue message \n 2. Dequeue message \n 3. Display Queue \n 4. EXIT\n");
+    scanf("%d",&choice);
+    switch(choice)
+    {
+      case 1:
+        printf("Enter message to be inserted : ");
+        scanf("%s", message);
+        enqueue(&q, message);
+        break;
+      case 2:
+        dequeue(&q);
+        break;
+      case 3:
+        display(&q);
+        break;
+      case 4:
+        exit(0);
+      default:
+        printf("Invalid Choice.\n");
+    }
+  }
+  return 0;
+}