嗯，名单是我们班同学的名单，我注释掉了，你们自己添加，有C++基础应该不难的。

#include <iostream>
#include <ctime>
#include <cstdlib>
#include <string>
#include <algorithm>

using namespace std;


const int N = 20000;

string b[]={
    
    "\0",
// 分组名单,如"张三","lisi",等等
};

struct xinxi_1802
{
    
    
    int date;
    int index;
};

int cmp(const void *a,const void *b)
{
    
    
    return ((struct xinxi_1802*)a)->date - ((struct xinxi_1802*)b)->date;
}

void choice_a_to_n(int *a,int first,int n)
{
    
    
    int i;
    struct xinxi_1802 number[N];
    srand((int)time(0));
    for(i=0;i<n;i++){
    
    
        number[i].date=rand();
        number[i].index=i+1;
    }
    qsort(number+first-1,n-first+1,sizeof(number[0]),cmp);
    for(i=0;i<n;i++){
    
    
        a[i]=number[i].index;
        // cout<<a[i]<<'e'<<endl;
    }
}


int main()
{
    
    
    int n;
    int first;
    cout<<"start: ";
    cin>>first;
    cout<<"end: ";
    cin>>n;
    int split;
    cout<<"每组的成员数：";
    cin>>split;
    int a[N];
    choice_a_to_n(a,first,n);
    for(int i=0;i<n-first+1;i++){
    
    
        if(i%split==0){
    
    
            cout<<endl;
            cout<<"第"<<(i/split+1)<<"组:";
            cout<<endl;
        }
        cout<<b[a[i+first-1]]<<endl;
    }
    return 0;
}