I am trying to find out if there is an alternative way of converting string to integer in C.
I regularly pattern the following in my code.
char s[] = "45";
int num = atoi(s);
So, is there a better way or another way?
I am trying to find out if there is an alternative way of converting string to integer in C.
I regularly pattern the following in my code.
char s[] = "45";
int num = atoi(s);
So, is there a better way or another way?
There is strtol which is better IMO. Also I have taken a liking in strtonum, so use it if you have it (but remember it's not portable):
long long
strtonum(const char *nptr, long long minval, long long maxval,
const char **errstr);
You might also be interested in strtoumax and strtoimax which are standard functions in C99. For example you could say:
uintmax_t num = strtoumax(s, NULL, 10);
if (num == UINTMAX_MAX && errno == ERANGE)
/* Could not convert. */
Anyway, stay away from atoi:
The call atoi(str) shall be equivalent to:
(int) strtol(str, (char **)NULL, 10)except that the handling of errors may differ. If the value cannot be represented, the behavior is undefined.