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preprocessor directives in C++

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Mr None answered on October 28, 2024 Popularity 5/10 Helpfulness 1/10

answer preprocessor directives in C++

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preprocessor directives in C++

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/* These are preprocessor directives in C++. They might sound like quite a mouthful, 
   but they're simply instructions that tell the compiler to include libraries.
   These libraries contain a set of pre-written functions and tools, making it easier 
   to perform various tasks without reinventing the wheel. */

// Library for standard input/output operations
#include <iostream>
// Library for general utilities
#include <cstdlib>

// It is preprocessor directives that allow access to these sets of functions

int main() {
    std::cout << "Hello, World!\n"; // cout is imported from iostream
    
    // Allocate memory for an array of 10 integers using new
    int* var = new int[10]; // new is used in place of malloc in C++

    // Check if memory allocation was successful
    if (var == nullptr) {
        std::cout << "Memory allocation failed!\n";
        return 1;  // Exit the program if memory allocation fails
    }

    // Assign values to the allocated memory
    for (int i = 0; i < 10; i++) {
        var[i] = i;
    }

    // Print values stored in allocated memory
    for (int i = 0; i < 10; i++) {
        std::cout << var[i] << " ";
    }
    std::cout << "\n"; // Newline for cleaner output

    // Free the allocated memory to prevent memory leaks
    delete[] var;  // delete[] is used to free memory allocated with new

    return 0; // Indicate successful program completion
}

Popularity 5/10 Helpfulness 1/10 Language cpp

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Tags: c++

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Contributed on Oct 29 2024

Mr None

0 Answers Avg Quality 2/10

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docker use database from host

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mysql://host.docker.internal:3306/my_awesome_database

Popularity 3/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: database host whatever docker

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Contributed on Oct 28 2024

EnzoK

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uri endpoint

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The URI of the data to be accessed, queried, or modified

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: Grepper

Tags: uri whatever endpoint

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Contributed on Oct 28 2024

Julio Krause

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preprocessor directives in C++

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