输入两个字符串，从第一字符串中删除第二个字符串中所有的字符。

在字符串中删除特定的字符

输入”They are students.” 和”aeiou”则删除之后第一个字符串变成　Ｔhy r stdnts。

本题还用到了 “字符串hash”


#include <iostream>
#include <cstring>

char * string_del_characters( char * const src, const char * const dest )
{
   int destLen = strlen( dest );
   int hash_table[256] = { 0 };
   char * p = src;
   int index = 0;
   for( int i = 0; i < destLen; i++ )
   {
      hash_table[ (int)dest[i] ] = 1;
   }
   while( *p != '\0' )
   {
      if( 0 == hash_table[(int)*p] )
      {
         src[index++] = *p;
      }
      p++;
   }
   src[index] = '\0';
   return src;
}

int main( int argc, char ** argv )
{
   char src[] = "They are students.";
   char dest[] = "aeiou";
   char * pResult = string_del_characters( src, dest );
   std::cout << pResult << std::endl;
}