大家帮我看看这程序是那里出错了！！

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

int main(void)
{
    int * p = (int *)malloc(sizeof(int));
    *p = 10;
  错误在这-->printf("%d\n", *P);

    free(p);

return 0;
}

错误提示：: error C2065: 'P' : undeclared identifier
怎么错了？？