Use the Makefile to make main.o file and executable file sum

to use Makefile, you  need to install cmake,makefile
you can also directly compile the .cpp file


###hw task6:(in /prog1)

in command line

cd /prog1
make

to crate main.o and sum

use make clean to delete these file

to achieve required precsion, i use for loop for 1e7 times, and use Khan algorithm.

###hw task5:(in /prog4)

a direct achieve to calculate differential.