泛型编程Selection Sort 选择排序

selection sort

#include <iostream>
#include "Student.h"

using namespace std;

template<typename T>
void selectionSort(T arr[], int n)
{
for(int i = 0 ; i < n ; i ++)
{
int minIndex = i;
for( int j = i + 1 ; j < n ; j ++ )
if( arr[j] < arr[minIndex] )
minIndex = j;

swap( arr[i] , arr[minIndex] );
}
}

int main() {

// 测试模板函数，传入整型数组
int a[10] = {10,9,8,7,6,5,4,3,2,1};
selectionSort( a , 10 );
for( int i = 0 ; i < 10 ; i ++ )
cout<<a[i]<<" ";
cout<<endl;

// 测试模板函数，传入浮点数数组
float b[4] = {4.4,3.3,2.2,1.1};
selectionSort(b,4);
for( int i = 0 ; i < 4 ; i ++ )
cout<<b[i]<<" ";
cout<<endl;

// 测试模板函数，传入字符串数组
string c[4] = {"D","C","B","A"};
selectionSort(c,4);
for( int i = 0 ; i < 4 ; i ++ )
cout<<c[i]<<" ";
cout<<endl;

// 测试模板函数，传入自定义结构体Student数组
Student d[4] = { {"D",90} , {"C",100} , {"B",95} , {"A",95} };
selectionSort(d,4);
for( int i = 0 ; i < 4 ; i ++ )
cout<<d[i];
cout<<endl;

return 0;
}

//

#ifndef INC_02_SELECTION_SORT_USING_TEMPLATE_STUDENT_H
#define INC_02_SELECTION_SORT_USING_TEMPLATE_STUDENT_H

#include <iostream>
#include <string>

using namespace std;

struct Student{

string name;
int score;

bool operator<(const Student& otherStudent)
{
return score != otherStudent.score ? score > otherStudent.score : name < otherStudent.name;
}

friend ostream& operator<<(ostream &os, const Student &student)
{

os<<"Student: "<<student.name<<" "<<student.score<<endl;
return os;
}
};

#endif //INC_02_SELECTION_SORT_USING_TEMPLATE_STUDENT_H