Problem with a verx simple c program.
 

Helo.

I wrote a very simple program in Kate:

#include <stdio.h>
main ()
{
int number;
printf("A number please.\n");
scanf("%d",number);
printf("%d\n",number);
return 0;
}

I compiled it with gcc, and then i cant execute it. It says "Segmentation fault"

not sure you can return an integer with out specifying main returns it first

you should do scanf needs the address of an int so it can change the value of the variable.

That was the problem. Interestingly, i don't remember reading in any tutorial, that "&" is needed when using scanf. Anyways, thank you.

I hope you didn't get the impression that & is a "magic" operator to use with scanf. If you have gotten to the end of any C tutorial without learning about pointers please find a better a tutorial.

The ampersand (&) tells the program to refer to the memory address of the variable, rather than the variable name itself. Basically it tells scanf to put the data in &number's memory place.