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class="hl opt">) { if (x <= 0) { return 0; } // use the table to help find an initial value double result = x; if (x >= 1 && x < 10) { std::cout << "Use the table to help find an initial value " << std::endl; result = sqrtTable[static_cast<int>(x)]; } // do ten iterations for (int i = 0; i < 10; ++i) { if (result <= 0) { result = 0.1; } double delta = x - (result * result); result = result + 0.5 * delta / result; std::cout << "Computing sqrt of " << x << " to be " << result << std::endl; } return result; } } }