string to int conversion 1

[qkslvrwolf]

Is there a fast, easy way to do string to int conversion in C? (C is driving me slowly insane, by the way).

Thanks!

sean

 

[Skatanic]

int main() {

char *str = "12345";
int number = atoi(char *str);
return 1;
}

There ya go.
Prototype for atoi:

int atoi(char *string_to_convert)

-Skatanic

 

[Skatanic]

heheheh I started typing the prototype in the code... change the line:
int number = atoi(char *str);
to:
int number = atoi(str);

Sorry...

 

[qkslvrwolf]

hey, thanks alot...it worked out great.

sean

 

[gonzilla]

Be careful with the value of the string though.

atoi() stands for alpha-to-integer

An integer too large will fail atoi. There are others that return long ints and unsigned long ints. Check them out as they may be useful.

Here I've listed some conversion routines from a man page on UNIX (make sure they are available to you first).

strtol, strtoll, strtoul, strtoull, atol, atoll, atoi,
lltostr, ulltostr

Check the documentation as the "str" versions differ from the "a" versions on error..ie. sending the function a value too large to convert.

-tyler

 

[qkslvrwolf]

Yeah...I actually managed to find the strtox functions while reading a man page for the atoi. And again it worked out really nicely...I'm able to read in decimal, hex, or octal values, which is really nice, and convert them straight to integer. Now if I could just get them into binary...

Thanks!
sean