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76 lines
1.5 KiB
C++
76 lines
1.5 KiB
C++
#include <iostream>
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#include <cstring>
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#include <vector>
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#include <algorithm>
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#include "number.h"
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Number fib(int n)
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{
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Number a = 0; // F0
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Number b = 1; // F1
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for (int i = 1; i <= n; ++i) {
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if (i % 2) {
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a += b;
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} else {
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b += a;
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}
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}
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if (n % 2) {
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return b;
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}
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return a;
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}
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Number factorial(int n)
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{
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Number result {
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1};
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for (int i = 2; i < n + 1; ++i) {
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result = Number(i) * result;
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}
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return result;
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}
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void grad(Number n)
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{
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std::cout << "n = " << n;
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Number max = n;
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unsigned long long int steps = 0;
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while (n != Number(1)) {
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if (n > max) {
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#ifdef _DEBUG_COMP
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std::cout << n << " is greater than " << max << std::endl;
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#endif
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max = n;
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}
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if (n.isEven()) {
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n.div2();
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} else {
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n = Number(3) * n + Number(1);
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}
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#ifdef _DEBUG_GRAD
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if (steps > 100) {
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std::cout << "break" << std::endl;
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break;
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}
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#endif
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++steps;
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}
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std::cout << " steps = " << steps << " max = " << max << std::endl;
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}
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int main()
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{
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std::cout << "===FIB===" << std::endl;
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std::cout << "F(1000) = " << fib(1000) << std::endl;
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std::cout << "===FAC===" << std::endl;
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std::cout << "1000! = " << factorial(1000) << std::endl;
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std::cout << "===GRAD===" << std::endl;
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grad(Number("7"));
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grad(Number("256"));
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grad(Number("1117065"));
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grad(Number("4761963248413673697"));
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grad(Number("90560792656972947582439785608972465789628974587264056284658721771"));
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}
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