帮我看看这个小程序啊，在存储的时候好像有问题，但不知道怎么改这种错误

Question

#include <stdio.h>
void main()
{
char a[]="I am a boy.";
char b[20];
char *p1,*p2;
int i;
p1=a;p2=b;
for (;p1!='\0';p1++,p2++)
*p2=*p1;
*p2='\0';
printf("this is the a string :%s\n",a);
printf ("this is the b string :");
for (i=0;b[i]!='\0';i++)
printf("%c",b[i]);
printf("\n");
}

Answer 1

#include <stdio.h>
void main()
{
char a[]="I am a boy.";
char b[20];
char *p1,*p2;
int i;
p1=a;
p2=b;

for(;*p1!='\0';p1++,p2++) //p1 修改为 *p1.
*p2=*p1;
*p2='\0';

printf("this is the a string :%s\n",a);
printf ("this is the b string :");
for (i=0;b[i]!='\0';i++)
printf("%c",b[i]);
printf("\n");

}

Answer 2

for (;p1[0]!='\0';p1++,p2++)
楼上跟我的本质是一样的

Answer 3

for (;p1!='\0';p1++,p2++) p1！='\0'改为*p1！='\0'