What is the data type of pointer variables? Suppose that we don‘t know the name of a variable but we do know its address. Can we access the contents of that variable? Explain briefly. Subject: C++
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A: Answer the above questions are as follows:
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Q: pointers in c++.
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What is the data type of pointer variables? Suppose that we don‘t know the name of a variable but we do know its address. Can we access the contents of that variable? Explain briefly.
Subject: C++
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- In C++, when using passing by pointers or references, how does that work? I know that using them is like copying the variable, but when passing by value, what confuses me is that it copies the values, so I am confused on what is the difference? And to also how to differentiate or find out how they are different?For C++, How would I call or use a function that is passed by pointer or a reference? How would I use these in this example below? I understand how passing by value works, but when it comes to passing by references and pointers, that is when I get confused. #include <iostream> using namespace std; // passing by reference in this function void pass_ref(int &ref); // passing by pointer in this function void pass_ptr(int* ptr);Why is it generally bad to return a pointer from a function in C? How does using dynamic memory give us the ability to safely return a pointerfrom a function?
- In C++, If you had the double-pointer above and also had these variables: type x, * q; And had executed these statements: q = &x; p = &q; How would a function given p by value be able to change the contents of x?Explain the different between a pointer variable and other variables such as int, float, char. You can draw a specific diagram to make your explanation clearer.In C++, what exactly is meant by the term "pointer variable"? What is the purpose of it?
- In C++, what does the term "pointer variable" mean? What does it do?2-Write a C++ program to swap two numbers using pointers and functions. How to swaptwo numbers using call by reference method. Logic to swap two number using pointers in C++program.ExampleInputInput num1: 10Input num2: 20OutputValues after swapping:Num1 = 20Num2 = 10A pointer variable is a kind of variable in C++. Do you know how it is utilised?
- Is it preferable to divide the lengthy software into smaller modules, each of which performs a certain function? These chunks are referred to as functions in C++ programming. Do you have any other comments to make about this?Can anyone solve this question in C++ using functions instead of libraries? Please store emails and passwords of users in an arrayOne kind of variable that may be used in C++ is called a pointer variable. Do you have any idea how it can be put to use?
