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- //**** Alpha Numeric functions
-
- #import <string.h>
- #import "alphanum.h"
-
- //* itoa: convert num to characters in str
- void itoa(int num, char str[])
- {
- int index, sign;
-
- if ((sign = num) < 0) //** record sign
- num = -num; //** make num positive
-
- index = 0;
- do { //** generate digits in reverse order
- str[index++] = num % 10 + '0'; //** get next digit
- } while ((num /= 10) > 0); //** delete it
-
- if (sign < 0)
- str[index++] = '-';
- str[index] = '\0';
-
- reverse(str);
- }
-
- //** reverse: reverse string str in place
- void reverse(char str[])
- {
- int c, index, j;
-
- for (index=0, j=strlen(str)-1; index<j; index++, j--) {
- c = str[index];
- str[index] = str[j];
- str[j] = c;
- }
- }
-