практика_структура_20

#include <fstream>
#include <algorithm>
#include <string>
#include <vector>
#include <functional>

using namespace std;

ifstream in("input.txt");
ofstream out("output.txt");

struct Person
{
        string name;
        string secondname;
        string surname;
        string number;
};

class compare: public unary_function<Person &, void>
{
private:
    string tmp;
    string temp;
public:
    compare(string a, string b): tmp(a), temp(b)
    {
    }
    void operator()(Person &x)
    {
        if(x.number.substr(0, 2) == tmp)
        x.number.replace(0, 2, temp);
    }
};

void print(Person &x)
{
    out << x.name << " " << x.secondname << " " << x.surname << " " << x.number << endl;
}

int main()

{
        vector <Person> vec;
        Person List;
        int n;
        in >> n;
        for(int i = 0; i < n; i++)
        {
                in >> List.name;
                in >> List.secondname;
                in >> List.surname;
                in >> List.number;
                vec.push_back(List);
        }
        string tmp, temp;
        in >> tmp;
        in >> temp;
        in.close();
        compare comp(tmp, temp);
        for_each(vec.begin(), vec.end(),comp);
        out << n << endl;
        for_each(vec.begin(), vec.end(), print);
        out.close();
        return 0;
}

//2
#include <fstream>
#include <algorithm>
#include <string>
#include <vector>
#include <functional>

using namespace std;

ifstream in("input.txt");
ofstream out("output.txt");

struct Person
{
    string name;
    string secondname;
    string surname;
    string number;
};

void print(Person &x)
{
    out << x.name << " " << x.secondname << " " << x.surname << " " << x.number << endl;
}

int main()

{
    vector <Person> vec;
    Person List;
    int n;
    in >> n;
    for (int i = 0; i < n; i++)
    {
        in >> List.name;
        in >> List.secondname;
        in >> List.surname;
        in >> List.number;
        vec.push_back(List);
    }
    string tmp, temp;
    in >> tmp;
    in >> temp;
    in.close();
    for_each(vec.begin(), vec.end(), [tmp, temp](Person &x){if (x.number.substr(0, 2) == tmp)
                                                                x.number.replace(0, 2, temp);});
    out << n << endl;
    for_each(vec.begin(), vec.end(), print);
    out.close();
    return 0;
}