用C语言将无符号整数转换为字符串

题目要求：用C语言编写实现如下函数，将无符号整数转换为字符串，例如将1234,转换为“1234”，不能使用itoa、sprintf等库函数。

#include 

void IntToAsc(unsigned int uiNum, unsigned char *sAscBuf)
{
    unsigned char t, *p = sAscBuf;
    for (; uiNum; p++)
    {
        *p = uiNum % 10 + '0';
        uiNum /= 10;
    }
    *(p--) = 0;
    for (; sAscBuf < p; sAscBuf++, p--)
    {
        t = *sAscBuf;
        *sAscBuf = *p;
        *p = t;
    }
}

void main()
{
    unsigned int i = 1234;
    unsigned char s[100] = "";
    IntToAsc(i, s);
    printf("%s\n", s);
}