sizeof笔试题

#include<stdlib.h>
#include<stdio.h>

int main(void) {
	char str[] = "hello";
	char *p = str;
	int n = 10;
	int a[5];
	char *ptr = (char*)malloc(100);

	struct s1{
        char z;
        double b;
        int c;
        char d;
    };
    struct s1 S1;

    struct s2{
        char e;
        char f;
        int g;
        double h;
    };
    struct s2 S2;

	printf("sizeof(str)=%d\n",sizeof(str));
	printf("sizeof(p)=%d\n",sizeof(p));
	printf("sizeof(n)=%d\n",sizeof(n));
	printf("sizeof(a)=%d\n",sizeof(a));
	printf("sizeof(ptr)=%d\n",sizeof(ptr));
	printf("sizeof(*ptr)=%d\n",sizeof(*ptr));
	printf("sizeof(*p)=%d\n",sizeof(*p));
	printf("sizeof(s1)=%d\n",sizeof(S1));
	printf("sizeof(s2)=%d\n",sizeof(S2));

	return 0;

}

先看这段代码的输出为