#include<stdio.h>
#include<conio.h>
struct node{
int data;
struct node *next;
};
struct node *creat_list(struct node *start);
void display(struct node *start);
struct node *addatbeg(struct node *start,int data);
struct node *addatend(struct node *start,int data);
int main(void)
{
struct node *start=NULL;
int choice,data;
while(1)
{
printf("1.creat linklist\n");
printf("2.display\n");
printf("3.add at beg\n");
printf("4.adda t end\n");
scanf("%d",&choice);
switch(choice)
{
case 1:
start=creat_list(start);
break;
case 2:
display(start);
break;
case 3:
printf("enter an element toe inserted");
scanf("%d",&data);
start=addatbeg(start,data);
break;
case 4:
printf("enter the element to be inserted");
scanf("%d",&data);
start=addatend(start,data);
break;
default:
printf("wrong choice");
}
}
}

i got the titled error.i am tring to run this program in quincy 2005.

Based on what you posted you have just made your prototypes but you have not actually defined any of the functions.

but inside switch case i have defined my funtion.i am beginner so give me a detail plz.

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