C-(结构体)结构体类型，变量，初始化

#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>

struct Book
{
    char name[20];
    int price;
    char id[12];
}b4,b5,b6;//全局变量
//匿名结构体类型只能用一次
struct
{
    char c;
    int i;
    char ch;
    double d;
}s;
//匿名结构体指针类型
struct
{
    char c;
    int i;
    char ch;
    double d;
}* ps;
struct S
{
    char c;
    int i;
}s1, s2;
struct B
{
    double d;
    struct S s;
    char c;
};
int main()
{
    //局部变量
    //struct S s3 = {'x', 20};
    struct B sb = { 3.14, {'w', 100},'q' };
    //.->操作符
    printf("%lf %c %d %c\n", sb.c, sb.s.c, sb.s.i, sb.c);
    return 0;
}