(*p)++和*（p++）和*p++的区别

* 和++优先级是同一级别，同一级别按照从右往左的顺序计算

所以:  *p++等价于*(p++)

 #define debug(x) cout << #x << " at line " << __LINE__ << " is: " << x << endl
 #include <iostream>
 #include <string>
 #include <vector>
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
 #include<assert.h>
 using namespace std;

 int main()
 {
     char *a="this a book";
     char *p = a;
     p++;
     printf("%c\n", *p);//output:h
     *p++;
     printf("%c\n", *p);//output:i
     // overflow
     char x = (*p)++;//Bad permissions for mapped region at address 0x4008D7
     printf("%d\n", x);

     while (*p != '\0') {
         printf("%c", *p++);//is
     }
     printf("\n");
     ;
 }