Pipe & Script Mode

When stdin is not a terminal (pipe or file redirect), or when a script file is passed as an argument, ccalc runs in non-interactive mode: no prompts, one result printed per line.

Pipe

echo "1 + 1" | ccalc
printf "100\n/ 4\n+ 5" | ccalc

Script files

Pass a file as an argument:

ccalc script.m
ccalc examples/mortgage.ccalc

Or redirect stdin:

ccalc < formula.txt

Comments

% starts a comment (Octave/MATLAB convention):

% full-line comment — line is skipped entirely
10 * 5  % inline comment — expression still evaluates

Semicolon — suppress output

A trailing ; suppresses output. Expressions still update ans; assignments never update ans regardless of ;.

rate = 0.06 / 12;    % silent assignment — ans unchanged
n = 360;             % silent assignment — ans unchanged
factor = (1 + rate) ^ n;

Multiple ;-separated statements on one line are also supported:

a = 1; b = 2; c = 3;    % all silent
a = 1; b = 2            % a = 1 silent, b = 2 printed

`disp(expr)` — print value

disp(expr) evaluates the expression and prints the result. It does not update ans.

disp(ans)               % print current ans value
disp(rate * 12)         % print expression result

`fprintf('fmt')` — print formatted text

fprintf('fmt') prints a string with escape sequences (\n, \t, \\). No newline is added automatically — include \n explicitly.

fprintf('=== Monthly mortgage ===\n')
fprintf('Result: ')
disp(ans)

Output:

=== Monthly mortgage ===
Result: 1199.1010503

Supported commands in pipe mode

All REPL commands except cls (which is ignored): exit, quit, who, clear, clear <name>, ws, wl, p, p<N>, hex, dec, bin, oct, base.

Example — mortgage script

% Monthly mortgage payment
% Principal: 200 000, annual rate: 6%, term: 30 years

rate = 0.06 / 12;         % monthly interest rate
n = 360;                  % 30 years * 12 months
p = 200000;               % principal

factor = (1 + rate) ^ n;

p * rate * factor / (factor - 1)
fprintf('Monthly payment ($): ')
disp(ans)

Output:

1199.1010503
Monthly payment ($): 1199.1010503

Keyboard shortcuts

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