Jump to content
  • Advertisement

Archived

This topic is now archived and is closed to further replies.

SpikyQube

Turning a member of a string to an integer?

This topic is 6583 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

This is bothering me, How do I turn a member of a string to an integer, let''s say: char string1[9]; int number; scanf("%s", string1); some people might type in something like "hello", which is a string, but others might and will type in 5, or 6, or a number. So basically string1[0] is a number, but in string format. How do I like convert it into an integer format (store the value in number) without change its value? Like if someone type in a 6, and I do: printf("%d\n", number) It''ll like display 6, ya know? Thanx I want to work for Squaresoft ;)

Share this post


Link to post
Share on other sites
Advertisement
Convert it to an integer..

If you have:

char number[] = "32768"; // Number as text..

then you can say:

int n;
sscanf(number, "%d", &n);
printf("The number is %d\n", n);

Or, use the C-Runtime function atoi() (ascii to integer)

int n;
n = atoi(number);
printf("The number is %d\n", n);


Hope that helps..

// CHRIS

Share this post


Link to post
Share on other sites
AWWWW, I need to familiarize myself with the standard C library!!! That will be my goal for the next few weeks, hehe...

Thanks for the help man! I greatly appreciated

I want to work for Squaresoft ;)

Share this post


Link to post
Share on other sites
Let this be a testament to the dangers of self education:
I never knew about atoi(), I actually wrote my own function to do this..I felt pretty good at the time, now I feel sort of ridiculous ..you can all start laughing now..

"Like all good things, it starts with a monkey.."

Share this post


Link to post
Share on other sites
you can also do..

scanf("%s", string1);
printf("The first number is %d", (int) string1[0]-''0'');


..-=gLaDiAtOr=-..

Share this post


Link to post
Share on other sites
The ato* functions are unreliable. They return 0 if they can''t successfuly convert the given string to a number. So there''s no way of determining if the user entered "0" or an invalid number. Use sscanf instead.

Share this post


Link to post
Share on other sites

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!