My first topic

Welcome to your first DITA Project.

You can add images or use reusable content:

#include <iostream>
using namespace std;

int main() {
    string str = "C++ Programming";

    // you can also use str.length()
    cout << "String Length = " << str.size();

    return 0;
}

${\oint }_C\overrightarrow{B}\circ \mathrm{d}\overrightarrow{l}={\mu }_0(I_{\text{enc}}+{\epsilon }_0\frac{\mathrm{d}}{\mathrm{d}t}{\int }_S\overrightarrow{E}\circ \hat{n}\mathrm{d}a)$