C语言的指针和结构

Question

I have this definitions of my structures:

typedef struct{
    char name[100];//the probleme is here
    char type[100];//and here
    int quantity;
} product;

typedef struct{
    int dim;
    product produs[100];
} ceva1;

typedef struct{
    int dim;
    ceva1 produs[1000];
} ceva;

In main i have this code:

int main(){
    ceva *pointer,obiect;
    pointer=&obiect;
    test1(pointer)
    obiect.dim=0;
    return 0;
}

When I try to run this program, I get an error saying "c.exe has stoped working". I've seen that, if I remove objiet the error will dissapear but I have a function and when I call that function the error appears again. What's wrong?

void test1(ceva *pointer){
pointer->produs[0].produs[0].quantity=1;

}

Answer 1

您可能用完了堆栈空间。

Answer 2

Let's note that sizeof(ceva) > 20000000 , so you're likely running out of stack space. Instead, you can allocate the data on the heap:

int main(){
    ceva *data = malloc(sizeof(ceva));
    test1(data);
    free(data);
    return 0;
}

Answer 3

Your ceva structure takes up over 20MB of space. That's probably a lot more than the available space you have on the stack, which commonly results in a crash at runtime (a stackoverflow)

Allocate it dynamically instead:

int main(){
    ceva *pointer = malloc(sizeof *pointer);
...