临时写的没有测试数据 有错误请多包涵program xianxu;var
zx,hx:string;procedure make(zx,hx:string);var gen:char;
p:longint;begingen:=hx[length(hx)]; //找到根p:=pos(gen,zx);if (p>=1)and(p<=length(hx)) thenbegin
write(gen);
make(copy(zx,1,p-1),copy(hx,1,p-1));//递归左子树
make(copy(zx,p+1,length(zx) |