错误信息 "expression preceding parentheses of apparent call must have (pointer-to-) function type" 通常出现在C或C++编程中,它的意思是“在括号前的表达式必须是一个(指向)函数类型的指针”。这意味着你试图像调用函数那样使用一个值或对象,但这个值或对象并不是一个函数,也不是一个指向函数的指针。 常见编...
X(I)之类的小括号改为方括号X[I]小括号表示函数调用, 方括号才表示数组索引
"mfcc.c", line 27: error: expression must have (pointer-to-) function type "mfcc.c", line ...
called pi. I then later tried to use it in my function called circleArea that i defined on line 59. when entering my constant pi, an error popped up that told me Error: expression must have(pointer-to-) function type. can somebody please tell me what this means, and how to fix it...
Have you read this thread?C++ Calling Member Function by Function Pointer Error https://stackoverflow.com/questions/43175015/c-calling-member-function-by-function-pointer-error?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa...
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...
USER\usartcmd.c(121): error: #109: expression must have (pointer-to-) function type USER\...
USER\usartcmd.c(121): error: #109: expression must have (pointer-to-) function type USER\...
expression must have pointer-to-class type 表达式必须有指向类类型的指针 expression must have pointer-to-class type 表达式必须有指向类类型的指针
这里this是个当前类的对象的指针,如果要用->可以不用加*,直接this->name(),而*this将取用对象,则用(*this).name()