acessing multi variables declared and initialised in one class from a different class

[Syed Asher]

Im trying to code a program with multiple classes such the one of the class reads the variables from a text file and the other classes use these variables for further processing.
The problem im facing is that im having trouble passing the variables from one class to another class, i did try "friend" class and also tried to use constructors but failed
to get the desired output.
The best i could do was
suppose i have class 1 and class 2, and i have a variable "A=10" declared and initialised in class 1, with the help of constructor i inherit it in class 2;
when i print it in class 1, it gives a correct output as 10 but when i print it in class 2 it gives a output as 293e30 (adress location)
Please guide me on how to this.
Thank you in advance

Class 1
{
public:
	membfunc()
	{
		int A;
		A=10;
	}
}

Class 2
{
public:
	membfunc2()
	{
        	int B;
	        B=A+10;
	}

	membfunc3()
	{
        	int C, D;
	        C=A+10;
	        D=B+C;
	}
}

the expected output when printed should be
A=10, B=20, C=20, D=40.
but the output which im getting is
A=10, B=(262e12)+10