#include<iostream>

using namespace std;

int temp = 12;
void test(void );
int main(void )
{
                 int temp = 13;
                cout << "in main: " << temp <<"    address: " << endl;
                test();
                cout << "in main: " << temp << "    address":  << &temp << endl;
                 return 0;

}
void test(void )
{
                 int temp = 14;
                cout << "in func: " << temp << "       address":  << &temp << endl;
                {
                                 int temp = 15;
                                cout << "in func block: " << temp << "            address: " << &temp << endl;
                }
                cout << "in func: " << temp << "       address: " << &temp << endl;

	}



	 



	从结果上面看出，全局变量和局部变量同名的情况下，局部变量会显示，而全局变量会被局部变量隐藏，在局部变量作用完了之后，全局变量才显现出来