Разъясните пожалуйста задачу

#include <iostream>
using namespace std;
const int n=3;
struct STRUCT
{
    char fio[80];
    int phone;
    int date[3];
}note[n];
 
int main()
{
int i, k;
int c=0;
for(i=0;i<n;i++)
{
cout<<"Zapis'"<<i<<"\n";
cout<<"FIO\n";
cin>>note[i].fio;
cout<<"Phone number:\n";
cin>>note[i].phone;
cout<<"Day:\n";
cin>>note[i].date[0];
cout<<"Month:\n";
cin>>note[i].date[1];
cout<<"Year:\n";
cin>>note[i].date[2];
}
cout<<"Vvedite mesyac: ";
cin>>k;
for (i=0;i<n;i++){
for(int j=0;j<n-1;++j)
{
if((int)note[j].fio[0]>(int)note[j+1].fio[0])
{
STRUCT X;
X = note[j];
note[j] = note[j+1];
note[j+1] = X;
}
}
}
for (i=0;i<n;i++)
if (note[i].date[1]==k)
{
c=1;
cout<<"Zapis'"<<i<<"\n";
cout<<"FIO:"<<note[i].fio<<"\n";
cout<<"Phone number:"<<note[i].phone<<"\n";
cout<<"Day:"<<note[i].date[0]<<"\n";
cout<<"Month:"<<note[i].date[1]<<"\n";
cout<<"Year:"<<note[i].date[2]<<"\n";
}
if (c==0)cout<<"Zapisei ne naideno";
system("pause");
return 0;
}

for (i=0;i<n;i++){
for(int j=0;j<n-1;++j)
{
if((int)note[j].fio[0]>(int)note[j+1].fio[0])
{
STRUCT X;
X = note[j];
note[j] = note[j+1];
note[j+1] = X;
}
}
}
for (i=0;i<n;i++)
if (note[i].date[1]==k)
{
c=1;