if(gListExp1-1]==0) s[top]->SetSon(1, p); if(p!=NULL) p->SetFather(l, stop }e stop]->SetSon(2, p); if(p!=NULL) p->SetFather(2, s[top); Sl++top]=p s while(top!=0) deletes returner6 if (gListExp[i - 1 ] == '(' ) { s[top] ->SetSon( 1 , p) ; if (p!=NULL) p ->SetFather( 1 , s[top]) ; } else { s[top] ->SetSon( 2 , p) ; if (p!=NULL) p ->SetFather( 2 , s[top]) ; } s[++top] = p ; }} while (top!= 0 ) ; delete [] s ; return rt ; }