c ++使用指针访问对象的成员 [英] c++ Accessing members of objects using pointers

问题描述

我有变量mode，我在下面的行中声明该变量:

I have variable mode, which I am declaring with the following line:

StatusRecord mode;

StatusRecord是struct，其中包含几个不同类型的变量.

StatusRecord is a struct which holds several variables of different types.

我现在想创建一个指向mode的指针，并通过使用函数填充其属性/字段来向该指针填充一些数据.我尝试这样做，如下所示:

I now want to create a pointer to mode, and populate that pointer with some data by using a function to populate its attributes/ fields. I have tried doing this as follows:

StatusRecord mode;
StatusRecord *modePtr = &mode;
DataStore->getModeData(*modePtr);

在这里，我声明了struct变量，创建了一个指向它的指针，并使用getModeData()函数填充了该指针.但是，我现在想使用我刚刚在条件语句中填充的struct ptr的属性:

Here, I am declaring the struct variable, creating a pointer to it, and populating that pointer using the getModeData() function. However, I now want to use an attribute of the struct ptr I've just populated in a conditional statement:

if(*modePtr->eraseSelect ==2){
    ...
}

但是我在这行上看到一个编译错误:

But I'm getting a compile error on this line that says:

错误:"*"的操作数必须是指针

Error: operand of '*' must be a pointer

这是否意味着eraseSelect属性应该是指针以及'modePtr`?我该如何解决该错误?

Does this mean that the eraseSelect attribute should be a pointer as well as 'modePtr`? How would I fix this error?

推荐答案

您无需在此处取消引用指针:

You dont need to dereference your pointer here:

if(modePtr->eraseSelect ==2){
    ...
}

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