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C or C++: Convert a character to an integer, etc.
Posted by 142857 [send private reply] at April 15, 2002, 11:28:26 PM //I don't mean ASCII code here.
//blah, blah, blah...
getter = getchar();
/*NOW: if getter is a number, make it into an int. Could we do this? Something using isalpha(), maybe?*/
/*...actually, maybe use the ASCII code and if it's within the number range (wherever that is--one can check) you subtract something from it...?*/
Posted by taubz [send private reply] at April 16, 2002, 12:34:35 AM You evidentally already know the solution, since you just said it. :)
Posted by vikram_1982 [send private reply] at April 16, 2002, 01:38:26 AM try the "itoa" and the "atoi" commands.
Posted by buzgub [send private reply] at April 16, 2002, 01:42:03 AM AFAIK, the C standard specifies that the characters representing the numbers from 0 to 10 shall be in a sequential block starting with 0. Therefore, 'n'-'0', where n can be any number, will always equal n.
Posted by Razvan [send private reply] at April 20, 2002, 02:54:25 AM If I understood your question, you want to read a number as a character and then convert it to an int that has the value of the number red. The solution I propose is:
-find the ASCII code for 1.
You can do this by writting a simple program that contains:
printf("%d = %c",i,i);
-then you do something like this:
getter-=ascii_code_for_1; // a-=b is equivalent to a=a-b;
// (just in case there is
// somebody that doesn't know)
This will still be a char, but it contanis the value you need, so you can assign this value to an int variable.
I don't have time to test this, but I think I used this in one of my programs a long time ago, and it should work. If it doesn't please tell me. It's an interesting problem.
Posted by webdesign11 [send private reply] at April 20, 2002, 07:54:21 AM The ASCii values for 0-9 are 48-57 (or, in hexadecimal "translation", 30-39).
Hope that helps!
Happy coding! :)
Posted by Psion [send private reply] at April 20, 2002, 09:27:20 AM It's not advisable to ever type ASCII codes into your programs. Instead, simply use '0' for the ASCII code for 0, etc.. This makes things much more portable.
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