procedure a; begin b {此时b未定义,则找不到b}end; procedure b; begin a end; procedure b;forward;{提前声明b过程,则编译器会搜索下面的过程}procedure a; begin b end; procedure b; begin a end;...
先定义,在调用。(下面还要再定义c过程)procedure a; begin b {此时b未定义,则找不到b} end; procedure b; begin a end; procedure b;forward;{提前声明b过程,则编译器会搜索下面的过程} procedure a; begin b e...