.typedef的用法

# include <stdio.h>

typedef int zhang; //为数据类为int从新取名为zhang 等价于int

typedef struct Student

{

    int sid;

    char name[];

    char sex;

}ST;

int main(void)

{

    int i = ; //等价于 zhang i = 10;

    struct Student st; //等价于 ST st;

    struct Student * ps = &st; //等价于ST * ps;

    zhang j = ;

    printf("%d\n", j);

    ST st2;

    st2.sid = ;

    printf("%d\n", st2.sid);

    return ;

}

.typedef的用法2

# include <stdio.h>

typedef struct Student

{

    int sid;

    char name[];

    char sex;

}* PST; //等价于struct Student *

int main(void)

{

    struct Student st;

    PST ps = &st;

    ps->sid = ;

    printf("%d\n", ps->sid);

    return ;

}

.typedef的用法3

# include <stdio.h>

typedef struct Student

{

    int sid;

    char name[];

    char sex;

}* PSTU, STU; //等价于STU代表了 struct Student,  PSTU 代表了struct Student * 

int main(void)

{

    STU st; //等价于 struct Student st;

    PSTU ps = &st; //等价于 struct Student * ps = &st;

    ps->sid = ;

    printf("%d\n", ps->sid);

    return ;

}