C语言 如何在 C 中访问 Struct 变量中的指针成员？
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How to access pointer members in a Struct variable in C?
提问by Raven
I'm not new to C but I just found out a problem which I have to deal with. How do I access the member of a struct that is a pointer to another struct?
我对 C 并不陌生，但我刚刚发现了一个我必须处理的问题。如何访问指向另一个结构的指针的结构成员？
ex.
前任。
typdef struct {
int points;
} tribute;
typedef struct {
int year;
tribute *victor;
} game;
int main(){
tribute myVictor;
myVictor.points = 10;
game myGame;
myGame.year = 1994; // Runs fine
myGame.victor = myVictor; // I want to point the victor member of the game struct to
//myVictor object... But it gives me an error
}
How could I correct this? I know that I should've made the myGame variable as a pointer.. but I'm asking if I can do this in a normal struct variable.
我怎么能纠正这个？我知道我应该把 myGame 变量作为一个指针......但我问我是否可以在普通的结构变量中做到这一点。
回答by WhozCraig
Try:
尝试：
myGame.victor = &myVictor;
回答by Lundin
This problem has nothing to do with structs as such. You are merely trying to copy a data variable into a pointer, which isn't valid. Instead of myGame.victor = myVictor;, let myGame.victor point to the address ofmyVictor.
这个问题与结构本身无关。您只是试图将数据变量复制到无效的指针中。而不是myGame.victor = myVictor;，让 myGame.victor 指向 myVictor 的地址。
myGame.victor = &myVictor;
myGame.victor = &myVictor;
回答by J.A.I.L.
If you want to point the victor member, you should pass the victor pointer (address, memory direction, ...).
如果你想指向 victor 成员，你应该传递 victor 指针（地址，内存方向，...）。
So, it sould be:
所以，应该是：
myGame.victor = &myVictor;
回答by Omkant
typdef struct {
int points;
} tribute;
typedef struct {
int year;
tribute *victor;
} game;
int main(){
tribute myVictor;
myVictor.points = 10;
game myGame;
myGame.year = 1994;
myGame.victor = &myVictor;
}
here victoris a pointerto tributeso you need to provide addressof myvictorSo error in the last line of your code here is the correct one
这里victor是一个pointer到tribute，所以你需要提供address的myvictor在你的代码在这里的最后一行这样的错误是正确的
changed to this in the last line : myGame.victor=&myVictor
在最后一行更改为： myGame.victor=&myVictor
回答by facebook-100001358991487
victor of game struct is pointer. So you should assign the address of myVictor. Something like this:
游戏结构的胜利者是指针。所以你应该分配 myVictor 的地址。像这样的东西：
myGame.victor = &myVictor;
printf("Points is: %d",myGame.victor->points);
