[C++知识库]C语言结构体

目录

结构体声明

结构体初始化

结构体访问

结构体传参

结构体声明?

结构体有自己的关键字struct

结构体声明：

struct Book
{
	char name[20];
	char author[15];
	float price;
}b1,b2;

结构体初始化

typedef struct Stu
{
	char name[20];
	int age;
	char id[20];
}Stu;

int main()
{
	struct Stu s1 = {"张三",20,"20210605"};
	Stu s2 = {"李四",15,"20210305"};
	return 0;
}

结构体访问

struct S
{
	int a;
	char c;
	double d;
};
struct T
{
	struct S s;
	char name[20];
	int num;
};
int main()
{
	struct T t = { { 100, 'c', 3.14 }, "李四", 30 };
	printf("%d %c %f %s %d\n", t.s.a, t.s.c, t.s.d, t.name, t.num);
	struct T* pt = &t;
	//printf("%d %c %f %s %d\n", (*pt).s.a);
	printf("%d %c %f %s %d\n", pt->s.a, pt->s.c, pt->s.d, pt->name, pt->num);
	return 0;
}

结构体传参

struct S
{
	int arr[10];
	int num;
	char ch;
	double d;
};

void print1(struct S ss)
{
	printf("%d %d %d %d %c %lf\n", ss.arr[0], ss.arr[1], ss.arr[2], ss.num, ss.ch, ss.d);
}
void print2(struct S* ps)
{
	printf("%d %d %d %d %c %lf\n", ps->arr[0], ps->arr[1], ps->arr[2], ps->num, ps->ch, ps->d);
}
int main()
{
	struct S s = { { 1, 2, 3, 4, 5 }, 100, 'w', 3.14 };
	print1(s);
	print2(&s);
	return 0;
}