c - 尝试 printf 时出现段错误

Question

当它尝试打印列表中的第二个成员时，为什么我会得到一个segmentationfault？

打印列表的第一个元素后，调试器打开 stdio.h 并说:

At C:\TDM-GCC-32\include\stdio.h:255
At C:\TDM-GCC-32\include\stdio.h:256
At C:\TDM-GCC-32\include\stdio.h:258
At C:\TDM-GCC-32\include\stdio.h:259

这是代码。

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

struct Student {
    char *Name;
    char *Adresse;
    unsigned long Mtnr;
    short Kurse;

    struct Student *next;
    struct Student *previous;
};

typedef struct Student Student;

Student *liste = NULL, *ende = NULL;

void add(char Name, char Adresse, unsigned long Mtnr, short Kurse) {
    Student *add;

    ende->next = malloc(sizeof(Student));
    add = ende->next;

    add->Name = Name;
    add->Adresse = Adresse;
    add->Mtnr = Mtnr;
    add->Kurse = Kurse;
    add->previous = ende;
    add->next = NULL;
    ende = ende->next;
}

void Ausgabe(Student *Anfang) {

    while (Anfang != NULL) {
        printf("%s %s %d %d \n", Anfang->Name, Anfang->Adresse, Anfang->Mtnr, Anfang->Kurse);
        Anfang = Anfang->next;
    }
}

int main() {
    liste = malloc(sizeof(Student));
    ende = liste;
    liste->Name = "Anna Musterfrau";
    liste->Adresse = "Am Schwarzberg-Campus 3";
    liste->Mtnr = 22222;
    liste->Kurse = 2;
    liste->next = NULL;
    liste->previous = NULL;

    add("Hans Peter", "Kasernenstrasse 4", 4444, 4);

    Ausgabe(liste);

    return 0;
}

Answer 1

错误在 add() 函数的声明中。字符串应该是字符指针，而不是字符。

void add(char *Name, char *Adresse, unsigned long Mtnr, short Kurse){