小编kra*_*mbo的帖子

我正在探索指针,特别是当前正在搞乱结构指针.目前,我有这个代码:

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

struct point{
double x;
double y;
};

int main(){
    char *pc;
    int *pi;
    struct point *pp;

    //char pointer
    printf("%p\n\n", (void*)pc);
    pc++;
    printf("%p\n\n", (void*)pc);

    //int pointer
    printf("%p\n\n", (void*)pi);
    pi += 2;
    printf("%p\n\n", (void*)pi);

    //struct pointer
    printf("%p\n\n", (void*)pp);
    pp -= 3;
    printf("%p\n\n", (void*)pp);
}

这段代码的输出是这样的:

0x104978036

0x104978037

0x7fff5ec4bbc8

0x7fff5ec4bbd0

0x0

0xffffffffffffffd0

据我所知,前4个输出,带char和int指针算法,但我很困惑,为什么它返回0x0的struct指针的内存地址？另外,如果我想double y在内存中说地址,我该如何打印？