Safe addition: Difference between revisions

Line 997:

However, if Wren is embedded in a suitable C program, then we can ask the latter to call it for us and pass back the result.

<syntaxhighlight lang="~~ecmascript~~">/* ~~safe_addition~~.wren */

<syntaxhighlight lang="wren">/* Safe_addition.wren */

class Interval {

construct new(lower, upper) {

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Note that Wren's built-in print statement never displays numbers with more than 14 digit accuracy. However, if the interval bounds had been displayed directly from C with 17 digit accuracy (the maximum for the 'double' type), there would have been a marginal difference between them, namely: [1.2299999999999998, 1.2300000000000002].

<syntaxhighlight lang="c">~~#include~~ ~~<stdlib~~.h>

<syntaxhighlight lang="c">/* gcc Safe_addition.c -o Safe_addition -lwren -lm */

#include <stdlib.h>

#include <stdio.h>

#include <math.h>

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WrenVM* vm = wrenNewVM(&config);

const char* module = "main";

const char* fileName = "~~safe_addition~~.wren";

const char* fileName = "Safe_addition.wren";

char *script = readFile(fileName);

WrenInterpretResult result = wrenInterpret(vm, module, script);