doubly linked list

execution of doubly link list using consumer data base

code/doublylinklist.cpp

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+#include<stdlib.h>
+#include<stdio.h>
+#include<malloc.h>
+
+struct node
+{
+
+	int id ;
+    char name[20];
+    struct node*prev;
+    struct node*next;
+    
+
+};
+
+
+node*temp,*start=NULL,*last=NULL;
+
+
+void creation();
+void deletion();
+void display();
+
+
+int main()
+{
+	int decision;
+	int ch;
+	ch=1;
+ while(ch==1)
+{
+	
+	printf(" \n 1.CREATE A NEW CONSUMER RECORD \n 2.DELETE A RECORD \n 3.DISPLAY \n  4.EXIT \n");
+	
+	printf("\n ENTER YOUR CHOICE ");
+	scanf("%d", &decision);
+	
+	
+	switch(decision)
+	{
+		
+		case 1 : creation();
+		          break;
+		          
+		          
+		case 2 :   deletion();
+					break;
+					
+					
+		case 3 :  display();
+					break;
+					
+					
+		case 4 : exit(0);
+		
+		
+	}
+
+}
+	return 0;
+}
+
+
+void creation()
+{   
+
+    int ch;
+    ch=1;
+	
+ while(ch==1)
+	
+ {
+	 	
+	
+	temp= (node*)malloc(sizeof(node));
+	
+	printf(" ENTER THE CONSUMER ID : ");
+	scanf("%d",&temp->id);
+	
+	printf(" ENTER THE CONSUMER NAME : ");
+	scanf("%s",&temp->name);
+	
+	
+    if(start==NULL)
+    {
+    	temp->prev=NULL;
+    	temp->next=NULL;
+    	start=last=temp;
+	}
+
+
+    else
+	{
+		 temp->next=start;
+		 start->prev=temp;
+		 
+		 start=temp;
+		 
+		 
+	}
+
+   printf(" WANT TO ENTER MORE (0/1) : ");
+   scanf("%d",&ch);
+
+}
+
+}
+
+void deletion()
+{
+	
+	if(start==NULL)
+	{
+		printf(" NO DATA TO DELETE");
+		
+		
+	}
+	
+	else
+   {
+		
+  	 temp=start;
+     node*temp2;
+     
+     while(temp->next!=NULL)
+     {
+     	temp2=temp;
+     	
+        temp=temp->next;
+     	
+     	
+	 }
+	    
+    temp2->next=NULL;	
+
+  
+  }
+	
+		
+}
+
+void display()
+{
+	temp=start;
+	
+	while(temp!=NULL)
+	{
+		
+	    printf(" C.NAME : %s  C.ID : %d  -->", temp->name,temp->id)	;
+	    
+	    temp=temp->next;
+		
+	}
+
+	printf("NULL \n");
+	
+}
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