#include<stdio.h>
main(){
int  x = 1;
      ;                      /*5һ*/
printf("x in main() = %d \n", x );	      /*6xֵ*/
{                               /*7ж*/
 int  x = 300;                  /*8ڿڶx,xͬ*/
     printf("x in block = %d \n", x );	 /*9xֵ*/
}                             /*10д*/
}
