[TOC] 貨幣經濟學 - 探究貨幣的由來、國際金融關係 貨幣經濟學在於探討金錢的本質 經濟，簡單來說就是交易 分工利益 資源分配 供需關係

[TOC] Development environment First you need the cross compiler to install the c ++ package.Here we use the toolchain of aarch64 linaro-7.4.1. Download tar file$ sudo wget https://releases.linaro.org/components/toolchain/binaries/7.4-2019.02/aarch64-linux-gnu/gcc-linaro-7.4.1-2019.02-x86_64_aarch64-linux-gnu.tar.xz Create folder for tool In order to maintain the tools in the future, the downloaded linaro toolchains are placed in /opt/aarch64-toolchains/linaro-7.4.1.$ sudo mkdir -p /opt/aarch64-toolchains/linaro-7.4.1