main: null.out
null.out:
./compile.sh 
clean: 
rm *.out

#!/bin/bash
for cpp in *.cpp
do
out="${cpp%.cpp}.out" 
if test ${cpp} -nt ${out} 
then
printf "g++ -o %s %s\n" "${out}" "${cpp}" 
g++ -o ${out} ${cpp}
fi
done