Segmentation fault (core dumped) when using fscanf to read into a pointer

Question

I\'m trying to use fscanf to read and print every character on the screen, but I\'m getting a segmentation fault (core dumped) when I run the program. Here\'s my code:

Answer 1

When you write:

int *a;

then a is a pointer, but currently it does not point anywhere.

You have to make it point to valid storage for an int, before you supply it to fscanf.

For example, inside main():

int b;
a = &b;
fscanf(input,"%d\n",a);

Also, your loop is wrong. It is almost always an error to use feof (let alone, as a loop condition). Instead, you should test the actual read operation. In your case:

while ( 1 == fscanf(input,"%d\n",a) )
{
     printf("%d\n", a);
}