C语言结构体与指针

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typedef struct{
    int pages;
    float price;
}BOOK;

int main(int argc, const char * argv[]) {

    BOOK aBook;
    aBook.pages = 300;
    aBook.price = 22.8;
    BOOK bBook = aBook;
    bBook.pages = 400;
    bBook.price = 40.7;

    printf("aBook.pages = %d, price = %.2f\n", aBook.pages, aBook.price);

    BOOK *pBook = &aBook;
    pBook->pages = 800;
    pBook->price = 60.6;
    printf("aBook.pages = %d, price = %.2f\n", aBook.pages, aBook.price);
    return 0;
}

上面代码首先定义了一个书籍的结构体类型，在main函数中声明了一本书A，并设置了页数和价格，接着将本书赋值给了另一本书B，并设置了页数和价格，声明一个指针指向了第一本书，并修改了其值，分别打印书A信息。结果如下：

aBook.pages = 300, price = 22.80
aBook.pages = 800, price = 60.60
Program ended with exit code: 0