80 lines
1.4 KiB
C++
80 lines
1.4 KiB
C++
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//
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// main.cpp
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// Program 1
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//
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// Created by Liyang Zhang 2016 on 6/10/13.
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// Copyright (c) 2013 Liyang Zhang 2016. All rights reserved.
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//
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//precompiler directives:
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#include <iostream>
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#include <iomanip>
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#include <fstream>
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#include <cmath>
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using namespace std;
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int main( )
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{
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// ********************* PROBLEM 3 *********************
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int i = 1;
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double s = 1, c = 1;
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cout << "Integer\tSquare Root\tCube Root" << endl;
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do {
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cout << i << "\t" << s << "\t\t" << c << endl;
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i += 1;
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s = pow(i,0.5);
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c = pow(i,1./3);
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} while (c < 2.5);
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cout << endl;
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// ********************* PROBLEM 4 *********************
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double cost = 1.95;
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int year = 2013;
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cout << "Year\tCost" << endl;
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cout << fixed;
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do {
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cout << year << "\t" << setprecision(2) << cost << endl;
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year += 1;
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cost *= 1.05;
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} while (cost <= 10);
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cout << year << "\t" << cost << endl;
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// ********************* PROBLEM 5 *********************
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int x;
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int x1;
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cout << "What is the value of x?\n > ";
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cin >> x1;
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if (abs(x1) != x1) {
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cout << "Can't be negative." << endl;
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return 0;
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} else {
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x = x1;
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int c = 0;
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do {
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if (x % 2 == 0) {
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x /= 2;
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} else {
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x = 3*x+1;
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}
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c += 1;
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cout << x << " ";
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} while (x != 1);
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cout << "It took " << c << " replacements." << endl;
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}
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return 0;
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}
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