Testing and Debugging

Unit Tests

In a unit test, a function or procedure is compiled outside the program in which it will be used, together with a test harness that feeds arguments to it.
Once you have confidence that the function is working correctly, you can plug it into your program.
Test data can be entered manually (see sqrtest1.cpp), in a loop (see sqrtest2.cpp), or using random number generation (see sqrtest3.cpp).