c++语言helloworld代码

以下是C语言的HelloWorld代码：

引用:

#include <iostream>
using namespace std;

int main() {
    cout << "HelloWorld" << endl;
    return 0;
}

引用:

#include <iostream>
using namespace std;

int main() {
    cout << "Hello world!" << endl;
    return 0;
}

引用:

cout << "Hello world!" << endl;

这些代码都实现了在控制台输出"Hello world!"的功能。其中，`cout`是C++中的输出流对象，`<<`是插入运算符，用于将字符串插入到输出流中，`endl`是控制符，表示换行。以上代码都是在C++环境下运行的，如果你需要在C环境下运行，可以将`#include <iostream>`和`using namespace std;`这两行代码删除。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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