程序代码：

#include<stdio.h>
#include<string.h>
#include<malloc.h>

int main()
{
    char a1[10]="zhongguo";
    char a2[10];
    char *p;
    int i=0;
    p=a1;
    printf("%d\n",strlen(a1));
    while(*p!='\0')
    {
        printf("%c\n",*p);
        a2[i]=*p;
        printf("%c\n",a2[i]);
        i++;
        p++;
    }
    printf("%d\n",i);
    printf("%d\n",strlen(a2));
    for(i=0;i<strlen(a2);i++)
        printf("%c",a2[i]);
    while(1);
}