How to convert char* to int and vice versa

[Xiaoming Zhang]

How can I in c program convert a char * 's value "123" to a integer's value 123 and vice versa?

Thanks.

Xiaoming

[RikTytgat · Accepted solution]

Hi,

int to char*
------------
Use sprintf("%d", i);

char* to int
------------
Use i = atoi("12345");

See the manpages for details.


Hope this helps,
Rik

[Dan Hetzel]

Hi,

For long integers, strtol() or ltostr() are supposed to be smaller and faster than using sprintf() for simple conversions, at least according to the manual.


Best regards,

Dan