#include<stdio.h>#include<stdlib.h>struct MyStruct{    int num;    float fl;    double db;    _Bool b;//c99新增的bool类型 1，0}my1 = { .num = 10, .fl = 10.9, .db = 19.8, .b = 0 };//初始化的形式void main(){    printf("%d,%f,%f,%d", my1.num, my1.fl, my1.db, my1.b);    struct MyStruct  my2 = (struct MyStruct){ .num = 10 };//默认会清零    printf("\n%d,%f,%f,%d", my2.num, my2.fl, my2.db, my2.b);    getchar();    //不能用变量直接初始化，需要用结构体初始化的方式直接初始化一个结构体变量    struct MyStruct *p = (struct MyStruct[])    {        [0] = { .num = 10, .fl = 10.9, .db = 19.8, .b = 0 },            [1] = { .num = 10 }    };    getchar();}