C : Working with structures and pointers , 错误:一元 ‘*’ 的无效类型参数

Question

我正在编写一个 C 程序，这是我正在使用的结构

struct EngineParts{

    int serial_number;
    unsigned int year_of_manufacture;
    unsigned int quantity;
    char *material;

}*Eparts;

我收到以下错误

`Automobile.c:79:5: error: invalid type argument of unary ‘*’ (have ‘unsigned int’)` 

`Automobile.c:80:5: error: invalid type argument of unary ‘*’ (have ‘int’)` 

`Automobile.c:81:5: error: invalid type argument of unary ‘*’ (have ‘unsigned int’)`

在这三行

 *new->quantity = quantity;
 *new->serial_number = serial_number;
 *new->year_of_manufacture = year_of_manufacture;

这里是完整的实现

void automobile_add_part(const int serial_number,
        const unsigned int year_of_manufacture,
        const unsigned int quantity , 
        const char *material){
    /*
     * Store the address to the latest part
     */
   struct EngineParts *new ;
   new = (Eparts+available_number_of_parts);

    // Copying a String is a little bit complicated
    // First memory is allocated for the string 
    *new->material = (char *)calloc(strlen(material),sizeof(char));
    //Then the string is copied
    strcpy((char *)*new->material,material);    

    *new->quantity = quantity;
    *new->serial_number = serial_number;
    *new->year_of_manufacture = year_of_manufacture;

    available_number_of_parts++;
}

附言:我检查了以下问题，

error: invalid type argument of ‘unary *’ (have ‘int’)

Invalid type argument of -> C structs

但他们似乎并没有帮助我。

有什么解决问题的建议吗？

Answer 1

-> 运算符已经为您解除了对指针的引用。

new->serial_number 等同于 (*new).serial_number，两者看起来都是您想要的。