#include<iostream.h>
char* fun(char* d,char* h)//去除一个字符串中相同的字符并存在另一字符串中
{    int i=0,j=0;
    int f(char b,char* a);
   
    h[0]=d[0];
    while(d[i]!='\0')
    {    if(d[i],h)
            {    h[j++]=d[i];
                h[j++]='\0';}
        i++;
    }
    return h;
    int f(char b,char *a)
    {    int x=0,v=1;
        while(h[x]!='\0')
            if(b==h[x])
            {v=0;
            break;}
    return v;}
}
void main()
{
    char *s="rwtdgdfrrrwfwffrrf";
    char ch[1024];
    cout<<fun(s,ch)<<endl;
}