calc — Simple Rust Calculator

Usage:

Run REPL:

cargo run

Quick calculation:

cargo run -- 3 + 4
# prints: = 7

In the REPL type exit or quit to leave. Supported operators: +, -, * (or x), /.

New operators:

• % : modulo (remainder)
• ^ or pow : power (exponent), e.g. 2 ^ 3 -> 8

Examples:

cargo run -- 12 % 5
cargo run -- 2 ^ 8

REPL improvements:

• Line editing and history via rustyline.
• History is saved to calc_history.txt in the current directory.

Try the REPL and use the up/down arrows to navigate past commands.