Answer Posted / ashish

#include<stdio.h>
#include<string.h>
void main()
{
int tail=1;
char str[200];
int d=0,i;
clrscr();
printf("\nenter the string:");
scanf("%s",&str);
d=strlen(str);
for(i=1;i<d;++i)
{
int j;
for(j=0;j<tail;++j)
{
if(str[i]==str[j])
break;
}

if(j==tail)
{
str[tail]=str[i];
++tail;
}
}
str[tail]=0;

printf("the string is:%s",str);
getch();
}

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