“expression must have pointer-to-object type” 错误详解 1. 错误信息含义 错误信息“expression must have pointer-to-object type”通常表明在代码中使用了非指针类型的表达式,但在该上下文中编译器期望一个指向对象的指针类型。这通常发生在使用了指针操作(如解引用*、下标[]等)或尝试将非指针类型的变量传递给...
因为子文件中引用主程序定义的结构体出错。解决:将子程序文件中 子函数移至主文件。结构体也是一种数据类型，只不过在这种数据类型中又包含了几个基本的数据类型。构体变量在内存中的存放和基本数据类型变量在内存中的存放是不同的，基本数据类型的存放系统是会给分配一块连续的空间用来存放，而结构体...
A = X[rows][1]; for ( count=0;count<Q;count++) { value_buf[count] = A[count]; // delay(); } #143 expression must have pointer-to-object type
第一个是未将对象引用到实例,在事件 ID_Area_Line中出现null对象,但是你又使用了此对象 这样就报错了 第二c语言为什么报错expression must have pointer-to-object type(代码很短) “expression must have pointer-to-object type”是C++编译器报错信息,意味着表达式必须是指向对象的指针类型。 在C++中,指针是指向...
问出现"void* is not a pointer-to-object type“错误，但代码在使用XCode时可以完美执行ENStruts has...
A conversion shall not be performed between a pointer to object type and a pointer to a different object type.
cout<<*ptr; //Error Message: 'void*' is not a pointer-to-object type getch(); } Please help, why this error occuring? Dec 14, 2012 at 1:44pm Zhuge(4664) You tell the compiler to dereference ptr, but since ptr is void* it has no idea what the memory at ptr is meant to look...
While a PictureBox has a member named Visible, pd points to a PictureBoxArray which is a different type of object than a PictureBox. Look at how member Visible is used in your function AddNewPictureBox.Maybe I have not defined PictureBoxArray correctly. Can I define a class as an array...
int m,n,i,a,b,c,a[900],j 两个变量a重复了。换个名字。
(TObject), POINTER :: ptr END TYPE TobjectRef TYPE, PUBLIC :: TobjectRef TYPE(objectPointer), ALLOCATABLE :: objPtrs END TYPE SUBROUTINE attach( this, objects ) TYPE(TobjectRef), INTENT(inout) :: this TYPE(Tobject), TARGET, INTENT(in) :: objects(:)...