What are the main differences between C++ and C Hello World?

C++ uses iostream library and cout, while C uses stdio.h and printf

What does "using namespace std;" do?

This line allows direct use of names from the standard library (like cout) without having to write std::cout

Hello World

Author:CodeSnippets

Language:

C++

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2025年9月16日

Code Implementation

C++

// Include input/output stream library
#include <iostream>

// Use standard namespace
using namespace std;

// Program entry point
int main() {
    // Output "Hello, World!" and newline
    cout << "Hello, World!" << endl;
    return 0;
}

C++ Hello World Example, C++ is an extension of C language, adding object-oriented programming and other features, widely used in system development, game development, etc.

#Getting Started