c++ - 类头文件

Question

主要.cpp

int main()
{
return 0;
}

细胞.h

#pragma once

class _cell {};

细胞.cpp

#include "cell.h"

实验.h

#pragma once

class _experiment
{
_cell cell;
};

实验.cpp

#include "experiment.h"
#include "cell.h"

错误:

experiment.h(5): error C2146: syntax error : missing ';' before identifier 'cell'
experiment.h(5): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
experiment.h(5): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

这让我抓狂。有什么帮助吗？谢谢!

Answer 1

你必须 #include <cell.h>来自 experiment.h否则_cell在 experiment.h 中使用时未定义.