C / C++ / MFC

class MyString {
	private:
		char *str;
	public :
	MyString():str(NULL){}
	MyString(const char* iStr);
	MyString(const MyString& iMyStr);
	~MyString();
	
	MyString& operator=(const MyString &iMystr);
	
	//friend MyString& operator+(const char* iStr, const MyString& iMyStr);
	friend char* operator+(const char* iStr, const MyString& iMyStr);
};

//Friend + , "xxx" + S
char* operator+(const char* iStr, const MyString& iMyStr)
{
	char * newStr = NULL;
	newStr = new char[strlen(iStr)+strlen(iMyStr.c_str()) + 1];
	strcpy(newStr,iStr);
	strcat(newStr,iMyStr.c_str());

	return newStr; //works well
        //return MyString(newStr); // compile error
}

int main()
{
   MyString S1("fgh");
  MyString S2("abc");
  
  S1 = "cde" + S1;
  return 0;
}

#include <iostream>

class A
{
public:
    A(int n = 0)
        : m_n(n)
    {

    }

    A(const A& a)
        : m_n(a.m_n)
    {

    }

private:
    int m_n;
};


int main()
{
    A a(2), b(1);

    const A c(a);

    const A &d = c;

    const A e = b; //Note 1

    b = d; //Note 2: I am confused here

    return 0;
}

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  CONTROL         "",IDC_STATIC_TST,"Static",SS_BLACKFRAME,80,83,118,35
80,83,118,35 based on client top left point?

Hi

I am new to c++ and I have an assignment to write a program to compute the Average daily solar energy collectable from January 1st to December 31st per square meter (kWh/m^2/day) using a 2-axis tracking collector in Albuquerque, can any one help me with this