| 1,20 → 1,42 |
|---|
| #include <string.h> |
| /* |
| char* itoa(int n, char* s) |
| #include <ksys.h> |
| |
| char *__reverse(char *str) |
| { |
| int sign; |
| char *ptr; |
| ptr = s; |
| char tmp, *src, *dst; |
| size_t len; |
| if (str != NULL){ |
| len = strlen (str); |
| if (len > 1) { |
| src = str; |
| dst = src + len - 1; |
| while (src < dst) { |
| tmp = *src; |
| *src++ = *dst; |
| *dst-- = tmp; |
| } |
| } |
| } |
| return str; |
| } |
| |
| if(n == (int)0x80000000) |
| return strcpy(s, "-2147483648"); // overflowed -n |
| /* itoa from K&R */ |
| void itoa(int n, char s[]) |
| { |
| int i, sign; |
| |
| if ((sign = n) < 0) n = -n; |
| do { |
| *ptr++ = n % 10 + '0'; |
| } while ((n = n / 10) > 0); |
| if (sign < 0) *ptr++ = '-'; |
| *ptr = '\0'; |
| return strrev(s); |
| } |
| */ |
| if ((sign = n) < 0) /* record sign */ |
| n = -n; /* make n positive */ |
| i = 0; |
| |
| do { /* generate digits in reverse order */ |
| s[i++] = n % 10 + '0'; /* get next digit */ |
| } while ((n /= 10) > 0); /* delete it */ |
| |
| if (sign < 0) |
| s[i++] = '-'; |
| |
| __reverse(s); |
| s[i] = '\0'; |
| return; |
| } |