Create queue.c

C++/queue.c

@@ -0,0 +1,86 @@
+#include<stdio.h> 
+
+int queue[100];
+int front = -1;
+int rear = -1;
+
+void insert()
+{
+	int item;
+	if(rear == 100-1)
+	{
+		printf("Overflow!\n");
+	}
+	else
+	{
+		if(front == -1)
+		{
+			front = 0;
+		}
+		printf("Insert the element in the queue : ");
+		scanf("%d", &item);
+		rear = rear+1;
+		queue[rear] = item;
+	}
+}
+
+void delete()
+{
+	if(front == -1 || front > rear)
+	{
+		printf("Queue is empty\n");
+	}
+	else
+	{
+		printf("DELETED!\n");
+		front = front + 1;
+	}
+}
+
+void display()
+{
+	if(front == -1)
+	{
+		printf("Queue is empty\n");
+	}
+	else
+	{
+		for(int i = front; i <=rear; i++)
+		{
+			printf("%d\t", queue[i]);
+		}
+	}
+	printf("\n");
+}
+
+
+int main() 
+{
+	int choice;
+	do 
+	{	
+		printf("1.Insert \n");
+		printf("2.Delete \n");
+		printf("3.Display \n");
+		printf("4.Quit \n");
+		scanf("%d", &choice);
+
+		switch (choice) 
+		{
+			case 1:
+				insert();
+				break;
+			case 2:
+				delete();
+				break;
+			case 3:
+				display();
+				break;
+			case 4:
+
+			default:
+				printf("Wrong choice \n");
+
+		}
+	}while(choice != 4);
+}