void input(classes s[])
{
    int i,j;
    cout<<"please input:"<<endl;
    for(i=1;i<=n;i++)
    {
        cin>>s[i].info.num>>s[i].info.name;
        for(j=1;j<=3;j++)
            cin>>s[i].info.score[j];
    }
}

void output(classes s[])
{
    int i;
    for(i=1;i<=n;i++)
    cout<<s[i].info.num<<" "<<s[i].info.name<<" "<<s[i].info.score[1]<<" "<<s[i].info.score[2]<<" "<<
    s[i].info.score[3]<<" "<<endl;
}为何最后一个name输不出来