C语言结构体排序方法

#include "stdafx.h"
#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
struct student
{
string name;//姓名
int math;//数学成绩
int english;//英语
};
int c =0;//控制排序规则
bool compare(student a, student b)
{
if (c == 0)//按照姓名递增排序
{
return (a.name<=b.name);
}
else if (c == 1)//按照数学成绩递增排序
{
return (a.math <= b.math);
}
else//按照英语成绩递增排序
{
return (a.english <= b.english);
}
}
int _tmain(int argc, _TCHAR* argv[])
{
student array[3];

array[0].name = "John";
array[0].math = 86;
array[0].english = 91;

array[1].name = "Michelle";
array[1].math = 85;
array[1].english =95;

array[2].name = "Kim";
array[2].math = 89;
array[2].english = 60;
cout << "原始顺序：" << endl;
for (int i = 0; i <3; i++)
cout << array[i].name << ' ' << array[i].math << ' ' << array[i].english << endl;
cout << "按姓名递增排序：" << endl;
c =0;
sort(array,array+3,compare);
for (int i = 0; i <3;i++)
cout << array[i].name << ' ' << array[i].math << ' ' << array[i].english << endl;
cout << "按数学成绩递增排序：" << endl;
c =1;
sort(array, array + 3, compare);
for (int i = 0; i <3; i++)
cout << array[i].name << ' ' << array[i].math << ' ' << array[i].english << endl;
system("pause");
return 0;
}