#include <iostream>
#include <algorithm>
using namespace std;

struct baby {
    int age;
}bb[6];
void test01()//赋值
{
     bb[1] = { 8 };
     bb[2] = {2};
     bb[3] = {3};
     bb[4] = {5};
     bb[5] = {6};
     bb[0] = {9};
}
bool cmp(baby a, baby b)//bool类型的函数
{
    return a.age < b.age;   //返回真则不交换，返回假则交换
}
int main()
{
    test01();

    sort(bb,bb+6,cmp);//注意不包含bb+6,即右边是开区间
    return 0;
}