Why the use of getch() shows error?

Question

struct node
{
    int data;
    struct node *next;
}   *start=NULL;

void create()
{
    char ch;
    do
    {
        struct node *new_node,*current;

        new_node = (struct node *)malloc(sizeof(struct node));

        printf("\nEnter the data : ");
        scanf("%d",&new_node->data);
        new_node->next = NULL;

        if(start == NULL)
        {
            start = new_node;
            current = new_node;
        }
        else
        {
            current->next = new_node;
            current = new_node;
        }

        printf("nDo you want to creat another : ");
        ch = getch();
    } while(ch!='n');
}

This is the part of the code which contains getch()

When I try to run this code in an online compiler I am getting this error: undefined reference to getch collect2: error: 1d returned 1 exit status

How to solve this problem?...Please help

Answer 1

There is no getch function in the standard C library, it only exist in Windows, and because it's not a standard function its real name is _getch (note the leading underscore). Judging by the error message your online compiler uses GCC, and most likely in a Linux environment, so no getch (or _getch) function.

If you want to be portable use fgetc or getc instead, or getchar (but note that those functions returns an int).

Answer 2

There is a getch in linux, but in a library

#include <ncurses/curses.h>

See http://linux.die.net/man/3/getch for more detail. If the online compiler works under linux, and get the ncurses library, this will be work !