Integer Arithmetic
The computer relies on arithmetic. Here we test a variety of arithmetic
operations expressed as 32 bit two's complement binary numbers (Java's
int).
 
| eg.ArithmeticFixture | 
| x | y | + | - | * | / | 
| 0 | 0 | 0 | 0 | 0 | 0 | 
| 1 | 2 | 3 | -1 | 2 | 0.5 | 
| 1 | -1 | 0 | 2 | -1 | -1 | 
| 10000 | 10000 | 20000 | 0 | 100000000 | 1 | 
| 100000 | 100000 | 200000 | 0 | 10000000000 | 1 | 
| 1000000 | 1000000 | 2000000 | 0 | 1000000000000 | 1 | 
Now we try something similar using automatic type conversion offered by ColumnFixtures (BFL1).
    
        | eg.ArithmeticColumnFixture | 
    
        | x | y | plus() | times() | divide() | floating() | 
    
        | 2 | 3 | 5 | 6 | 0 | 0.6666667 | 
    
        | 0 | 0 | 0 | 0 | error | error | 
    
        | 0 | 0 | 0 | 0 |  |  | 
    
        | 200 | 300 | 500 | 60000 | 0 | 0.6666667 | 
    
        | 2 | 3 | 10 | 10 | 10 | 
    
        | 200 | 3 | 5 | 6 | 0 | 0.6666667 | 
    
        | 2 | -3 | -1 | -6 | -0 | -0.6666667 | 
Document prepaired by Ward Cunningham
First Version July 11, 2002
Last Update August 17, 2002