Just a few simple math-related C and C++ programs and functions. These are written extremely pedantically in either Allman or OTB styles, with 2-space or 4-space indentation.

Benchmarks for the factorial functions

Recursive factorial_r(12), 100,000,000 iterations

real    0m6.067s
user    0m5.861s
sys     0m0.039s

For-loop factorial_f(12), 100,000,000 iterations

real    0m4.656s
user    0m4.596s
sys     0m0.030s

Recursive factorial_r(3), 100,000,000 iterations

real    0m1.248s
user    0m1.231s
sys     0m0.009s

For-loop factorial_f(3), 100,000,000 iterations

real    0m0.918s
user    0m0.735s
sys     0m0.007s