This is to achieve a class calculator evaluating a numeric expression. Prefixed expressions are used to facilitate analysis: no priority no associativity the battery is required to calculate the recursive calls For example,+/4 2 1 the result is 3 (= 4/2+ 1) On the other hand, the character - being used as a sign by StreamTokenizer, the corresponding binary operator will be represented by the word "less".

Calculette
..........\.classpath
..........\.project
..........\.settings
..........\.........\org.eclipse.jdt.core.prefs
..........\bin
..........\...\Calculette.class
..........\...\ErreurSyntaxiqueException.class
..........\...\Operateur.class
..........\...\Operateurs.class
..........\src
..........\...\Calculette.java
..........\...\ErreurSyntaxiqueException.java
..........\...\Operateur.java
..........\...\Operateurs.java

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