问题
I have downloaded CygWin(32-bit) and installed (on Windows 7 32 bit System) today to run shell script but i found one problem that bc command isn't working.
I am getting error -bash: bc: command not found. So please help me out!
回答1:
You need to select the bc package for installation from the "Select Packages" window.
By default setup installs only base category that is ~ 50 packages,
while the full availability is ~ 4000.
https://cygwin.com/packages/x86/bc/bc-1.06.95-2
回答2:
On Windows Cygwin, run setup.exe and search for "bc" in the "Math" category, click on it and hit Next to install.
On Unix/Linux you'll probably be needed to install this package Using:
sudo apt install bc
回答3:
I believe that bc is not installed by default on Cygwin, and you will need to install it manually. This link might help you.
DISCLAIMER: I have never used Cygwin.
来源：https://stackoverflow.com/questions/39054508/bc-command-not-working-in-cygwin