//函数演示#include 
     
      void show(){    std::cout<<"中国 您好!";}int main(){	show();	std::cout<<"show函数调用完成"<
      
       int show(int x, int y){    return x+y;}int main(){	int a, b;	std::cout<<"请输入两个值:"<
       
        >a;	std::cin>>b;	std::cout<<"a+b的值为:"<
        
         void show1(){     std::cout<<"hello world";}int show(int x, int y){     return x+y;}int main(){    int a, b;	std::cout<<"请输入两个整数值:"<
         
          >a;	std::cin>>b;	std::cout<<"a+b="<
          
           <
           
            using namespace std;void B();void A(){ cout<<"这是a函数"<
            
             using namespace std;void swap(int x, int y); //弄相用引用都没成功，真笨啊，忘光了int main(){ int i=3, j=4; cout<<"main函数中, i:"<
             <<", j:"<
              
               <
               
                using namespace std;void swap(int *x, int *y); //看了一下，总算引用传值在C++中弄定了int i=22, j=88;int main(){ cout<<"main函数中, i:"<
                <<", j:"<
                 
                  <