C语言中结构体点初始化

直接上代码：

#include <stdio.h>

struct point {
    int x;
    int y;
};

struct rect {
    int num;
    char name[32];
    struct point a;
    struct point b;
    struct point c;
};

void print(struct rect *prect)
{
    printf("num:%d\n", prect->num);
    printf("name:%s\n", prect->name);
    printf("a.x:%d\n", prect->a.x);
    printf("a.y:%d\n", prect->a.y);
    printf("b.x:%d\n", prect->b.x);
    printf("b.y:%d\n", prect->b.y);
    printf("c.x:%d\n", prect->c.x);
    printf("c.y:%d\n", prect->c.y);
}

int main(int argc, char *argv[])
{
    struct rect rect = {
        num : 123, /*直接使用成员名，后面用冒号*/
        .name = "Jack", /*使用点加成员名，后面用等号*/
        .b =
        {
            .x = 3,
            .y = 4,
        },
        a :
        {
            x : 1,
            .y = 2,
        },

    };
    print(&rect);
}