程序代码：

#include <stdio.h>


struct s1 
{ 
    char *s; 
    int i; 
    struct s1 *sip; 
}; 

int main () 
{ 
    struct s1 a[]={{"abcd",1,a+1},{"efgh",2,a+2},{"ijkl",3,a}};/*注释*/ 
    struct s1 *p=a; 
    int i=0; 
    printf("%s %s %s\n",a[0].s,p->s,a[2].sip->s); 
    printf("\n%d %d\n",i+2,--a[i].i); 
    a[i].s[3]++;//写入位置 0x0041576f 时发生访问冲突
    printf("\n%c\n",a[i].s[3]); 
    return 0;
}