//第二十三模板 11模板参数提供默认值/*#include 
     
      #include 
      
       using namespace std;//默认参数 class T2=inttemplate
       
        class People{public:	T1 &getx();	T2 &gety();	T1 getx()const{ return x;}	T2 gety()const{ return y;}	People(const T1&a, const T2&b):x(a),y(b){ cout<<"构造函数执行"<
        
         T1&People
         
          ::getx(){    return x;}template
          
           T2&People
           
            ::gety(){ return y;}int main(){ People
            
             one[4]={ People
             
              ("hello world",5), People
              
               ("good morning",6), People
               
                ("sit down please",8), People
                
                 ("have a cup of tea",2) }; int num = sizeof(one)/sizeof(People
                 
                  ); cout<<"输出对像数组one的所有元素"<