Create circularqueue.cpp

circularqueue.cpp

@@ -0,0 +1,113 @@
+//this is program for circular-queue in C++ languauge
+
+#include<iostream>
+using namespace std;
+int q[4];
+int f=-1;
+int r=-1;
+void insert_element()
+{
+
+    if(f==0 and r==3 or f==r+1)
+    {
+
+        cout<<"Queue overflow....!!"<<endl;
+    }
+    else
+    {
+        int ele;
+        cout<<"Enter the element : "<<endl;
+        cin>>ele;
+        r=(r+1)%4;
+        q[r]=ele;
+        cout<<"Element inserted in Queue sucessfully...."<<endl;
+        if(f==-1)
+        {
+            f=0;
+        }
+    }
+
+
+
+}
+void remove_element()
+{
+    if(f==0 and r==-1)
+    {
+        cout<<"Queue underflow...."<<endl;
+    }
+    else
+    {
+        cout<<"Element "<<q[f]<<" removed sucessfuly..."<<endl;
+        f=(f+1)%4;
+    }
+}
+void display()
+{
+    if(f==0 and r==-1)
+    {
+        cout<<"Queue is EMPTY..."<<endl;
+    }
+    else
+    {
+        if(f<=r)
+        {
+            int i=f;
+            while(i<=r)
+            {
+                cout<<q[i]<<"  ";
+                i++;
+
+            }
+        }
+        else
+        {
+             for(int i=0;i<=r;i++)
+            {
+                cout<<q[i]<<endl;
+            }
+            for(int i=f;i<=3;i++)
+            {
+                cout<<q[i]<<endl;
+            }
+
+        }
+
+    }
+
+
+}
+
+int main()
+{
+     int i;
+    do{
+            printf("\n\t\tCIRCULAR QUEUE OPERATIONS\n");
+            printf("\n****************MENU**********************\n");
+
+            printf("\n1-INSERT elements in queue:\n");
+            printf("2- REmOVE elements in queue:\n");
+            printf("3-DISPLAY elements in queue:\n");
+            printf("4-EXIT\n");
+            printf("Provide your choice :");
+            cin>>i;
+            switch(i)
+            {
+            case 1:
+                insert_element();
+                break;
+            case 2:
+                remove_element();
+                break;
+            case 3:
+                display();
+                break;
+            case 4:
+                exit(0);
+            }
+}while(true);
+
+
+
+
+}