结构体嵌套（合并定义）

#include <stdio.h>

struct student
{
  char name[20];
  struct scorestruct
  {
    int math;
    int english;
  } scores;

  struct infostruct
  {
    float height;
    float weight;
  } info;
};

// 结构体嵌套
int main()
{
  struct student wangyu = {"Wang wu", {80, 96}, {175, 80}};
  printf("wangwu's name: %s\n", wangyu.name);
  printf("wangwu's math scores: %d\n", wangyu.scores.math);  // 双层内容访问
  printf("wangwu's english scores: %d\n", wangyu.scores.english);
  printf("wangwu's height: %.1f cm\n", wangyu.info.height);
  printf("wangwu's weight: %.1f kg\n", wangyu.info.weight);
}