ref: e062038db3825e8355e2c4ae6413f88eb816e58b
dir: /README/
This is an rpn calculator with basic trigonometric functions. It runs in the terminal, which acts like a ticker tape of the state of the calculations througout the session. There is a four position stack as in HP RPN calculators, labeled x, y, z, t from bottom to top. Trigonometric functions act on x, and algebraic functions act on y and x. It should be familiar to users of RPN calculators. Entering pi loads the constant pi into x. There are also exponentiation and logarithmic functions. Enter r to roll, which drops the stack and puts x into t. Enter d to drop, which drops the bottom value off the stack and duplicates t into z. Enter x to swap x and y on the stack. Hitting enter will re-enter the last x value. To exit, enter q, to clear the stack to all zeros, enter cls.