In the following code for a linked list implementation, I am getting the error cannot convert node_type to node * for argument 1 to 'node *insert(node *)'
. I don't understand this message. Basically the program is not able to call the function insert
from main()
.
Can anyone help explain this?
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
struct node_type
{
int data;
node_type *next;
};
typedef struct node_type node;
node *insert(node *head);
void print1(node *temp);
int main(void){
int dat;
char x,ch;
node *temp;
temp=NULL;
printf("do u wanna enter a new node? \n");
scanf("%c", &x);
if (x=='y' or x=='Y'){
temp=(node *)malloc(sizeof(node));
printf("enter the data: \n");
scanf("%d ", &dat);
temp->data= dat;
temp->next = NULL;
}
printf("do u want to insert another element?\n");
scanf("%c ", &ch);
if( ch=='y' or ch=='Y'){
insert(temp);
}
print1(temp);
getch();
}
node *insert(node *temp)
{
int dat;
char ch1;
node *newnode;
newnode=(node *)malloc(sizeof(node));
printf("enter the data: ");
scanf("%d", &dat);
newnode->data=dat;
newnode->next=temp;
temp=newnode;
printf("do u want to insert another element?\n");
scanf("%c ", &ch1);
if( ch1=='y' or ch1=='Y'){
insert(temp);
}
else return temp;
}
void print1(node *temp)
{
int t;
while(temp!= NULL){
t= temp->data;
temp= temp->next;
printf(" %d ", t);
}
}
A few problems in your code:
The definition of struct node_type
struct node_type { int data; node_type *next; };
is not right according to C syntax, type node_type
does not exist before the typedef struct node_type node;
statement.
To fix this, you could
a) define struct node_type
like this
struct node_type { int data; struct node_type *next; };
or
b) use (Thanks @yongzhy)
typedef struct node_type { int data; struct node_type *next; };
or
c) compile your code with a C++ compiler. (Thanks @JonathanLeffler)
All these
if (x=='y' or x=='Y'){
should be replaced by
if (x=='y' || x=='Y'){
or you could just include <iso646.h>
, which includes #define or ||
in it (Thanks @JonathanLeffler),
or you should compile your code with a C++ compiler.
add to @leeduhem
typedef struct node_type
{
int data;
struct node_type *next;
} node;
this will void additional line of
typedef struct node_type node;
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