Hi,
Using Backtracking,
void swap(char* x,char* y)
{
char temp;
temp=*x;
*x=*y;
*y=temp;
}
void permute(char* a,int i,int n)
{
int j;
if(i==n)
printf("%s\n",a);
else
{
for(j=i;j<=n;j++)
{
swap((a+i),(a+j));
permute(a,i+1,n);
swap((a+i),(a+j));
}
}
}
But this takes O(n*n!) time
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