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NNTP-Posting-Date: Sat, 09 Jun 2012 15:50:02 -0500
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Date: Sat, 09 Jun 2012 16:50:03 -0400
From: pete <pfiland@mindspring.com>
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Xref: csiph.com comp.lang.c:22080

Zhang Yuan wrote:
> 
> On Saturday, June 9, 2012 7:28:16 PM UTC+8, pete wrote:
> > pete wrote:

> > >         while(curr -> num != 0){
> > >             puts("enter name and age");
> > >             scanf("%s%d", curr -> name, &(curr -> age));
> > >             curr = malloc(sizeof *curr);
> >
> > That doesn't make any sense!

> >             scanf("%s%d", curr -> name, &(curr -> age));
> >             if (1 > scanf("%d", &(head -> num))) {

And then I screwed it up again!

/* BEGIN new.c */

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

struct stu {
    struct stu *next;
    int num;
    int age;
    char name[12];
};

void stu_free(struct stu *head);
void stu_print(struct stu *head);

int 
main(void)
{
    struct stu *curr, *head;
    
    puts("/* BEGIN new.c */ output\n");
    head = malloc(sizeof *head);
    if (head != NULL) {
        curr = head;
        curr -> next = NULL;
        puts("enter number");
        if (1 > scanf("%d", &(head -> num))) {
            puts("\n\nscanf problem.\n\n");
            exit(EXIT_FAILURE);
        }
        while(curr -> num != 0) {
            puts("enter name and age");
            if (1 > scanf("%s%d", curr -> name, &(curr -> age))) {
                stu_free(head);
                puts("\n\nscanf problem.\n\n");
                exit(EXIT_FAILURE);
            }
            curr -> next= malloc(sizeof *(curr -> next));
            if (curr -> next == NULL) {
                break;
            }
            curr = curr -> next;
            curr -> next = NULL;
            puts("enter number");
            scanf("%d", &(curr -> num));
        }
        *(curr -> name) = '\0';
        curr -> age = 0;
    }
    stu_print(head);
    stu_free(head);
    puts("\n/* END new.c */ output");
    return 0;
}


void 
stu_free(struct stu *head)
{
    struct stu *next;

    while (head != NULL) {
        next = head -> next;
        free(head);
        head = next;
    }
}

void 
stu_print(struct stu *head)
{
    while (head != NULL) {
        printf("\nnumber is %d\n", head -> num);
        printf("name   is %s\n", head -> name);
        printf("age    is %d\n", head -> age);
        head = head -> next;
    }
}


/* END new.c */



-- 
pete