| /programs/develop/ktcc/trunk/libc/stdlib/atoi.c |
|---|
| 0,0 → 1,21 |
| #include "stdio.h" |
| #include "stdlib.h" |
| #include "ctype.h" |
| /* |
| ** atoi(s) - convert s to integer. |
| */ |
| int atoi(char *s) |
| { |
| int sign, n; |
| while(isspace(*s)) ++s; |
| sign = 1; |
| switch(*s) { |
| case '-': sign = -1; |
| case '+': ++s; |
| } |
| n = 0; |
| while(isdigit(*s)) n = 10 * n + *s++ - '0'; |
| return (sign * n); |
| } |