char s[10]={'a','b','c','d','e','f','g','h','i','j'};int top=-1;t=CreateTree(t,s);if(t!=NULL){ p=t;while(top>-1||p!=NULL){ while(p!=NULL){ top=top+1;st[top]=p;p=p->lchild;} if(top>-1){ p=st[top];top--;printf("%c ",p->data...