C++模板

#include<iostream.h>/*函数模板*/template<class type> //type 叫做模板参数type add(type a,type b){type c = a+b;return c;}class complex //重载{public:double a;double b;complex(){}complex(double x,double y){this->a = x;this->b = y;}complex operator+(complex c){complex c1;c1.a = this->a + c.a;c1.b = this->b + c.b;return c1;}};void main(){int x = 10;int y = 20;int z = add<int>(x,y);cout<<z<<endl;double a = 10.123;double b = 20.345;double c = add<double>(a,b);cout<<c<<endl;complex c1(1,2);complex c2(10,20);complex c3 = add<complex>(c1,c2);cout<<c3.a<<" + "<<c3.b<<"i"<<endl;}

 

#include<iostream.h>/*类模板*/template<class type,int size>class Array{private:type* p;public:Array(){p = new type[size];}~Array(){if(p !=NULL)delete[] p;}void push(type val,int i){*(p+i) = val;}type Get(int i){return *(p+i);}};class complex //重载{public:double a;double b;complex(){}complex(double x,double y){this->a = x;this->b = y;}complex operator+(complex c){complex c1;c1.a = this->a + c.a;c1.b = this->b + c.b;return c1;}void print(){cout<<this->a<<" + "<<this->b<<"i"<<endl;}};void main(){complex c1(1,2);complex c2(10,20);complex c3(100,200);Array<complex,10> arr;arr.push(c1,0);arr.push(c2,1);arr.push(c3,2);for(int i=0;i<3;i++){arr.Get(i).print();}}

 

#include<iostream.h>#include<vector>#include<algorithm>using namespace std;bool compare(int a,int b){if(a>b)return true;elsereturn false;}void main(){std::vector<int> vec;for(int i=0;i<10;i++){vec.push_back(i+1);}for(i =0;i<10;i++){cout<<vec[i]<<" ";}cout<<endl;vector<int>::iterator it;for(it = vec.begin();it!=vec.end();it++){cout<<*it<<" ";}cout<<endl;it = vec.begin();it++;vec.insert(it,100);for(it = vec.begin();it!=vec.end();it++){cout<<*it<<" ";}cout<<endl;it = vec.begin();for(i=0;i<4;i++){it++;}vec.erase(it);for(it = vec.begin();it!=vec.end();it++){cout<<*it<<" ";}cout<<endl;sort(vec.begin(),vec.end(),compare);for(it = vec.begin();it!=vec.end();it++){cout<<*it<<" ";}cout<<endl;}

 

#include<iostream.h>#include<vector>#include<algorithm>#include<string.h>using namespace std;class student{private:int sid;char name[20];int age;double score;public:student(){}student(int sid,char* pname,int age,double score){this->sid = sid;strcpy(this->name,pname);this->age = age;this->score = score;}void print(){cout<<this->sid<<" "<<this->name<<" "<<this->age<<" "<<this->score<<endl;}char* getName(){return name;}double getScore(){return score;}};bool compare_name(student st1,student st2){if(strcmp(st1.getName(),st2.getName())>0){return false;}elsereturn true;}bool compare_score(student st1,student st2){if(st1.getScore()>st2.getScore()){return true;}elsereturn false;}void main(){student st1(1,"zhangshan",23,98);student st2(2,"lisi",12,100);student st3(3,"wangwu",34,23);student st4(4,"amakif",45,67);student st5(5,"eee",38,76);vector<student> vec;vec.push_back(st1);vec.push_back(st2);vec.push_back(st3);vec.push_back(st4);vec.push_back(st5);vector<student>::iterator it;for(it = vec.begin();it!=vec.end();it++){(*it).print();}cout<<endl<<endl;sort(vec.begin(),vec.end(),compare_score);for(it = vec.begin();it!=vec.end();it++){(*it).print();}}