数据结构练习（26）在字符串中删除特定的字符

#include <iostream>
#include <cstring>
using namespace std;

void DeleteChars(char *src, const char *dst)
{
if (!src || !dst)
return;

const int hashsize = 256;
int hash[hashsize];
memset(hash, 0, sizeof(hash));

const char *p = dst;
while (*p != '\0')
{
hash[*p] = 1;
++p;
}

char *pfast = src;
char *pslow = src;

while (*pfast != '\0')
{
if (hash[*pfast] != 1)
{
*pslow = *pfast;
++pslow;
}
++pfast;
}
*pslow = '\0';
}

int main()
{
char s1[100] = "They are students.";
char s2[100] = "aeiou";
DeleteChars(s1, s2);
return 0;
}