Counter
.......\.classpath
.......\.project
.......\.settings
.......\.........\org.eclipse.jdt.core.prefs
.......\bin
.......\...\Calculate.class
.......\...\Counter.class
.......\...\InToPost.class
.......\...\Sign.class
.......\...\StackN.class
.......\...\StackX.class
.......\src
.......\...\Calculate.java
.......\...\Counter.java
.......\...\InToPost.java
.......\...\Sign.java
.......\...\StackN.java
.......\...\StackX.java