#include  <stdio.h>
 #include  <string.h>
 struct Student  
 {  
    char name[20];      //学生姓名  
    unsigned int num;   //学号  
    int isMale;         //性别      
 }s1;  
   
 int main(void)  
 {  
     //student s1;
     memset(&s1,0,sizeof(s1));
     printf("s1.name = %s, s1.num = %d, s1.isMale = %d.\n", s1.name, s1.num, s1.isMale);   
       
     //第一种赋值方式:给结构体变量的赋值  
     s1.name[0] = '0';  
     s1.name[1] = 'i';  
     s1.name[2] = 'm';  
     s1.name[3] = '\0';  
       
     s1.num = 123;  
     s1.isMale = 1;  
     printf("s1.name = %s, s1.num = %d, s1.isMale = %d.\n", s1.name, s1.num, s1.isMale);   

    //第二种赋值方式
    struct Student s2 = {"xiaowang",123456,666};
    printf("s2.name = %s, s2.num = %d, s2.isMale = %d.\n", s2.name, s2.num, s2.isMale);   

    //第三种赋值方式
    //此种方式不用全部初始化,只初始化部分变量,赋值用逗号隔开
    struct Student s3 = 
    {
        .num = 200
    };
     printf("s3.name = %s, s3.num = %d, s3.isMale = %d.\n", s3.name, s3.num, s3.isMale);   
    return 0;  
 }