sizeof

#include<stdio.h>struct AA{        char a;        double b;        float c;};struct BB{                     int a;                     double b;                     float c;         };struct CC{        int a;        float b;        double c;};struct DD{        float a;};int main(int argc, char *argv[]){        printf("%d\n",sizeof(struct AA));        printf("%d\n",sizeof(struct BB));        printf("%d\n",sizeof(struct CC));        printf("%d\n",sizeof(struct DD));}~    

输出如下：

1616164