Memory Address Program

Introduction

This C++ program demonstrates how to obtain and display the memory addresses of two specific variables: an integer and a double. Understanding memory addresses is fundamental in C++, as it provides insight into where data is stored in memory. This program defines a function, memoryAddresses, that accepts an integer and a double by reference and prints their respective memory addresses to the console.

Program Overview

The program consists of:

1. A memoryAddresses function that prints the memory addresses of an integer and a double variable passed by reference.

2. A main function that declares example integer and double variables and calls memoryAddresses to display their addresses.

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Code

#include <iostream>
using namespace std;

void memoryAddresses(int &var1, double &var2) {
    cout << "Memory address of first variable: " << &var1 << endl;
    cout << "Memory address of second variable: " << &var2 << endl;
}

int main() {
    int intVar = 42;
    double doubleVar = 3.14;

    memoryAddresses(intVar, doubleVar);

    return 0;
}

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Function: memoryAddresses

void memoryAddresses(int &var1, double &var2);

Purpose

The memoryAddresses function outputs the memory addresses of an integer and a double variable passed by reference.

Parameters

• int &var1: A reference to the first variable of type int. The function will print this variable's memory address.

• double &var2: A reference to the second variable of type double. The function will print this variable's memory address.

Output

The function prints the memory addresses of var1 and var2 to the console, formatted with explanatory text.

Example Usage

int intVar = 42;
double doubleVar = 3.14;
memoryAddresses(intVar, doubleVar);

In this example, the function will output the memory addresses of intVar and doubleVar.

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Function: main

int main();

Purpose

The main function serves as the program’s entry point and demonstrates the use of the memoryAddresses function.

Functionality

1. Variable Declaration: Declares two example variables, intVar (an integer) and doubleVar (a double).

2. Function Call: Calls memoryAddresses with intVar and doubleVar to display their memory addresses.

Output

Upon execution, the program outputs the memory addresses of intVar and doubleVar in the following format (addresses will vary):

Memory address of first variable: 0x7fffc4d6ec4c
Memory address of second variable: 0x7fffc4d6ec50

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Program Requirements

• C++ Compiler: Requires a C++ compiler that supports basic I/O, such as any compiler compatible with C++98 or later.

• Standard Library: Only <iostream> is required for console output.

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Conclusion

This program is a straightforward example of how to access and print memory addresses in C++ for variables of specific types. By focusing on the memory addresses of an integer and a double, it introduces concepts of memory management, pointers, and references in C++. This approach can be adapted to various contexts where understanding or managing memory addresses is crucial.