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.

eg.ArithmeticColumnFixture
x y plus() times() divide() floating()
2 3 5 6 0 0.666667
0 0 0 0 error error
0 0 0 0
200 300 500 60000 0 0.666667
2 3 10 10 10
200 3 5 6 0 0.666667
2 -3 -1 -6 -0 -0.666667


fit.Summary

Document prepaired by Ward Cunningham
First Version July 11, 2002
Last Update August 17, 2002