Checking core structure...
compile_project:10: no matches found: *.in
rm -f calc-core.jar `find . -name \*.class`
(cd src; javac -encoding UTF-8 `find . -name \*.java`)
./calc/core/SUB.java:7: error: class MUL is public, should be declared in a file named MUL.java
public class MUL extends FuncBin implements Serializable{
       ^
./calc/core/MUL.java:7: error: duplicate class: calc.core.MUL
public class MUL extends FuncBin implements Serializable{
       ^
2 errors
make: *** [all] Error 1