高效实现整型数字转字符串int2str的方法

char* int2str(unsigned int values){  const char digits[11] = "0123456789";  char* crtn = new char[32];  crtn += 31;  *crtn = '/0';  do   {    *--crtn = digits[values%10];  } while (values /= 10);  return crtn;}

char* int2str(unsigned int values){  int len = 0; const char digits[11] = "0123456789"; unsigned int tvalue = values; while(tvalue >= 100) { tvalue /= 100; len += 2; } if (tvalue > 10) len += 2; else if(tvalue > 0) len++; char* crtn = new char[len+1]; crtn += len; *crtn = '/0'; do  { *--crtn = digits[values%10]; } while (values /= 10); return crtn; }