supply a common OS interface, file, socket, time, etc.

In linux, use the following tools: 1. gcc 2. make How to compile the test program in linux? #make -f unix_test.mk #make -f unix_test.mk clean

In windows, install pelles C first, use the following tools: 1. cc 2. pomake How to compile the test program in windows? #pomake -f win32_test.mk #pomake -f win32_test.mk clean