来个大神

有做过返回值是字符串的函数的大神没有？
除了将字符串指针放进函参之外，还有其他办法没有？
unsigned char oxchar[5];
unsigned char mast[]={
'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'
};
void hex(unsigned char c)
{
oxchar[0] = '0';
oxchar[1] = 'x';
oxchar[2] = mast[c>>4];
oxchar[3] = mast[c&0xf];
oxchar[4] = '\0';
}