在C中将指针设置为NULL，而不进行编译

Question

for some reason, when I try to compile my code the .exe file just disappears after its done... without any errors or warnings.

This is what my code looks like:

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

typedef struct student_ 
{
    int matnum;
    char vorname[20];
    struct student_ *next;
} student;

int main (int argc, char **argv) 
{
    student hans;
    hans.matnum = 12;

    student peter;
    peter.matnum = 13;
    peter.next = NULL; // THIS PART CAUSES MY PROBLEM

    hans.next = &peter;

    student *curr = &hans;
    while(curr != NULL)
    {
        printf("matnum: %d\n", (*curr).matnum);
        curr = curr->next;
    }

    return 0; 
}

What I want it to do is iterate through curr and set it to the next everytime curr wasn't NULL already. So if next is NULL, than the while-loop should stop.

peter.next = NULL; // THIS PART CAUSES MY PROBLEM

This is how I want to achieve that but it doesn't work. :\\

---

From the comments:

I don't get an error. AFter I type in "gcc -Wall -o test test.c" the test.exe is there for a second and then it gets deleted.

Answer 1

The most plausible explanation for this is that your anti-virus software is deleting the executable. Your program compiles and runs fine here.

For whatever reason, the suspect line results in compiled code that your anti-virus software matches against a known virus. When you remove that line, it no longer matches the virus, but of course the program fails.

Temporarily disable your anti-virus to confirm this hypothesis.