Thread: Salem this for u !

Can you please tell me how i can change this line ?


newptr->ID = NUM;
printf ("%d",NUM);

newptr->nextptr=(node*)malloc(sizeof(node));
newptr=newptr->nextptr;

Like so

Code:

#include <stdio.h>
#include <stdlib.h>

void traverse(void);

/* Structure for printing the id.txt file */
struct id_card {
    int ID;
    struct id_card *nextptr;
};

typedef struct id_card node;

void traverse(void) {
    FILE *fp;
    node *currptr = NULL, *headptr = NULL, *prevptr = NULL;
    int NUM, i;

    fp = fopen( "id.txt","r" );
    if ( fp == NULL ) {
        printf( "Unabale to open id.txt file \n" );
        exit( 1 );
    }

    for(i = 1; i<=8; i++) {
        NUM = getc( fp );
        NUM = NUM-48;
        currptr = malloc( sizeof(node) );

        currptr->ID = NUM;
        currptr->nextptr = NULL;
        printf( "%d",NUM );

        if ( headptr == NULL ) {
            /* List is empty - start a new list */
            headptr = currptr;
            prevptr = currptr;
        } else {
            /* append to existing list */
            prevptr->nextptr = currptr;
            prevptr = currptr;
        }
    }

    currptr = headptr;
    while ( currptr != NULL ) {
        printf( "\n" );
        printf( "%d", currptr->ID );
        currptr=currptr->nextptr;
    }

    fclose( fp );
}


int main( ) {
    traverse();
    return 0;
}

Thanx Salem the program looks good, but i have one error on


Line 28 currptr = malloc( sizeof(node) );

how can i fix it i have a message saying

cannot assign 'void near' to 'id_card near*' in function

any idea how i can sot it out ?