linux下练习 c++ 库函数排序使用举例

//使用库函数排序举例
#include <iostream>
#include <string>
#include <algorithm>//内有排序库函数
using namespace std;
#ifndef person_h_1  //预定义指令
#define person_h_1
class person
{
public:
	person(const char* name,int age):name(name),age(age){}//构造函数
	friend ostream& operator<<(ostream& o,const person& p)//重载输出
	{
		return o<<p.name<<":"<<p.age<<' ';
	}
	friend bool operator <(const person& a,const person& b)//重载小于
	{
		return a.age<b.age;
	}
private:
	string name;
	int age;
};
#endif

template<typename T>
void print(T b,T e)//输出数组内容
{
	bool isnull=true;
	while (b!=e)
	{
		cout<<*b++<<' ';
		isnull=false;
	}
	if(isnull==false) cout<<endl;
}

int main()
{
	int a[6]={5,8,6,4,9,1};
	double b[4]={4.4,3.2,6.7,1.2};
	string c[5]={"yeah","are","you","people","good"};
	person p[3]={person("ppp",23),person("kkk",21),person("mmm",20)};
	sort(a,a+6);//排序
	sort(b,b+4);
	sort(c,c+5);
	sort(p,p+3);
	print(a,a+6);//输出
	print(b,b+4);
	print(c,c+5);
	print(p,p+3);
}