#pragma once

class MyClass2;

class MyClass1                  
{
public:
    explicit MyClass1(int val) : a(val) {}
    MyClass1(int val, MyClass2& mc);
    int getA() const { return a; }
    void setB(const MyClass2& val)

private:
    int a;
    int b;
}

#include "MyClass1.h"
#include "MyClass2.h"

MyClass1::MyClass1(int val, MyClass2& mc)
{
    a = val;
    b = mc.getB();
    mc.setA(*this);
}

void MyClass1::setB(const MyClass2& val)
{
    b = val.getB();
}

#pragma once

class MyClass1;

class MyClass2
{
public:
    explicit MyClass2(int val) : b(val) {}
    int getB() const { return b; }
    void setA(const MyClass1& val);

private;
    int a;                  
    int b;
}

#include "MyClass2.h"
#include "MyClass1.h"

void MyClass2::setA(const MyClass1& val)
{
    a = val.getA();
}

#include "MyClass1.h"
#include "MyClass2.h"

int main()
{
    auto mc1 = MyClass1(228);
    auto mc2 = MyClass2(1488);
    mc1.setB(mc2);
    mc2.setA(mc1);
                         
    auto mc3 = MyClass2(1488);
    auto mc4 = MyClass1(228, mc3);
    return 0;
}

for(int k = 0; k<length;) {
     char ch = getchar();
     if (ch != '\n') {
         *(*(mas+i)+k) = ch;
         ++k;
     }
}