linux下itoa

#include <stdio.h>char *itoa(int value, char *string, int radix){    int rt=0;    if(string==NULL)        return NULL;    if(radix<=0 || radix>30)        return NULL;    rt = snprintf(string, radix, "%d", value);    if(rt>radix)        return NULL;    string[rt]='\0';    return string;}

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