C “值类型”；字符串*”；无法将分配给实体类型"；课程“；

我一直被这个错误困扰着，找不到解决问题的办法。我有一个函数（下面的代码）可以插入\u bts\u节点

enter code hereBSTNodePtr insert_bst_node(BSTNodePtr self, String *item) {

/* check if found location, then insert */
if (self == NULL) {
    self = malloc(sizeof * self);
    self->course = item;
    //item = strcpy(self->course, item);
    self->left = self->right = NULL;
    create_list(self->course);
    //self->course = create_list();

}

/**
* else if (item < self->course) {
    self->left = insert_bst_node(self->left, item);

}
*/
else if (strcmp(item,self->course)<0){
    self->left = insert_bst_node(self->left, item);

}
else if (strcmp(item,self->course) >0){
    self->right = insert_bst_node(self->right, item);
}

return self;

---

item

是

String*

类型，

self->course

是

struct course

类型，正如错误消息所说。 如果要将项目分配给课程名称（即

String

type），则应执行

self->course.name=*项目

typedef char* String;

typedef struct Course {
    String name;
    StudentList students;
} Course;

typedef struct bstNode {
    Course course;
    struct bstNode* left;
    struct bstNode* right;
} *BSTNodePtr;