求大神，这是怎么回事
#include <stdio.h>int main() {
int shu_zu[3] = {1,2,3};
int *p_shu_zi = NULL;
P_shu_zi = shu_zu;
printf("shu_zu[1]是%d,p_shu_zi[1]是%d\n",shu_zu[1],p_shu_zi[1]);
return 0;
}
1 : error C2065: 'P_shu_zi' : undeclared identifier
2 : warning C4047: '=' : 'int ' differs in levels of indirection from 'int *'
Error executing cl.exe.
18whl.obj - 1 error(s), 1 warning(s)
