C++ can do an excellent job of catching unit mismatches at compile time. We have developed classes that support this: cInches in1, in2, in3; // basically

C++ can do an excellent job of catching unit mismatches at compile time. We have developed classes that support this: cInches in1, in2, in3; // basically 'floats' cCm cm1; // floats void foo(cInches); in1 = in2 + in3; // OK in1 = in2 + cm1; // compile error in1 = in2 * in3; // compile error: square inches are not inches in1 = in2 / in3; // compile error float x = in2 / in3; // OK foo(in1); // OK foo(cm1); // compile error Classes like these have made the code much more readable, maintainable and reduce errors.