fscanf string(char array) from index 1

Question

In C++ if you want to input a string and store it in a char array from index 1 you can do something like this:

ifstream f("data.in");
char a[100];
f.get(a+1,90);

Is there any way you can do this in C (like using fscanf)? Doing this:

fscanf(f,"%s",&a+1);

or this:

fscanf(f,"%s",&(a+1));

doesn't work.

&a + 1 generates an address 100 bytes beyond the start of a, because &a is char (*)[100] in this context, and incrementing a pointer by one jumps it by the size of the object being pointed at (which is an array of 100 bytes in this case). A good compiler would also complain about the type mismatch between expected char * and actual char (*)[100]. — Jonathan Leffler
– Jonathan Leffler, Commented Jan 5, 2015 at 22:12

Iharob Al Asimi · Accepted Answer · 2015-01-05 22:05:15Z

2

Yes there is, this way

fscanf(f,"%90s",a+1);

answered Jan 5, 2015 at 22:05

Iharob Al Asimi

53.1k6 gold badges66 silver badges100 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

It's to limit the number of characters fscanf must read, I suppose that's what f.get(a+1,90) does.

Also &a[1] for the third argument.