普通计算器功能的实现（包含加、减、乘、除、取模、取余等功能）。-The realization of common calculator functions (including add, subtract, multiply, divide, modulus, take over other functions).

lammps实例：硅的晶格常数和体弹模量的计算（含代码）-the lammps instance: the lattice constant of silicon and body shells modulus calculations (including code)