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17 lines
472 B
17 lines
472 B
"use strict"; |
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function main(formName) { |
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let result = document.getElementById("result"); |
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let n = document.forms[formName].elements[0].value; |
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if ( !/^[01]+$/.test(n) ) { |
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result.textContent = "Ошибка: n должно содежать только нули и единицы!"; |
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return; |
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} |
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result.textContent = "Результат: " + binToDecimal(Number(n)); |
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} |
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function binToDecimal(n) { |
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return n == 0 ? 0 : n % 10 + 2 * binToDecimal(Math.trunc(n / 10)); |
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} |