text: #include <stdio.h>
  
  int main(){
  	// 此句有语法错误
  	int const num=520;
  	int *p = &num;
  	
  	
  	/*
  	int num = 520;
  	const int *p = &num;
  	*/
  	/*
  	const int num = 520;
  	const int *p = &num;
  	*/
  	/*	
  	const int num = 520;
  	const int * const p = &num;
  	*/
  	printf("%d",*p);
  
  }
  