Why cant assign a numeral to a *P?

Question

I am a new learner for c. And I met with this ERROR.

int *p;
*p=6;//ERROR
int a=6;
*p=a;//Right

Could you please explain this situation? Thank you very much!

check this [post](https://stackoverflow.com/questions/897366/how-do-pointer-to-pointers-work-in-c) — dboy, May 07 '20 at 14:33

score 2 · Answer 1 · answered May 07 '20 at 14:33

2

Both example are incorrect.

Before you can dereference a pointer, you need to make it point someplace. For example:

int *p;
int a;
p = &a;
a = 5;
printf("*p=%d\n", *p); // prints *p=5
a = 6;
printf("*p=%d\n", *p); // prints *p=6

answered May 07 '20 at 14:33

dbush

1 Answers1