[044]C语言基础-结构体对齐

#include<stdio.h>

struct A
{
    char name;
    double age;
    char sex;
};

struct B
{
    char name;
    char sex;
    double age;
};

int main(int argc, char *argv[]) {
    printf("char->%d\n", sizeof(char));
    printf("double->%d\n", sizeof(double));
    printf("A->%d\n", sizeof(struct A));
    printf("B->%d\n", sizeof(struct B));
    return 0;
}

char->1
double->8
A->24
B->16

#include<stdio.h>

struct A
{
    char name;
    double age;
    char sex;
} a;

struct B
{
    char name;
    char sex;
    double age;
} b;


int main(int argc, char *argv[]) {
    printf("a.name->%d\n", &a.name);
    printf("a.age->%d\n", &a.age);
    printf("a.sex->%d\n", &a.sex);
    printf("A->%d\n", sizeof(struct A));

    printf("b.name->%d\n", &b.name);
    printf("b.sex->%d\n", &b.sex);
    printf("b.age->%d\n", &b.age);
    printf("B->%d\n", sizeof(struct B));
    return 0;
}

a.name->170442768
a.age->170442776
a.sex->170442784
A->24
b.name->170442792
b.sex->170442793
b.age->170442800
B->16