mathops.cpp

Thinking in C++ 2nd edition source code which are all the cores of the book Thinking in C++ second e

//: C03:Mathops.cpp
// From Thinking in C++, 2nd Edition
// at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Mathematical operators
#include <iostream>
using namespace std;

// A macro to display a string and a value.
#define print(str, var) cout << str " = " << var << endl

int main() {
  int i, j, k;
  float u,v,w;  // Applies to doubles, too
  cout << "enter an integer: ";
  cin >> j;
  cout << "enter another integer: ";
  cin >> k;
  print("j",j);  print("k",k);
  i = j + k; print("j + k",i);
  i = j - k; print("j - k",i);
  i = k / j; print("k / j",i);
  i = k * j; print("k * j",i);
  i = k % j; print("k % j",i);
  // The following only works with integers:
  j %= k; print("j %= k", j);
  cout << "enter a floating-point number: ";
  cin >> v;
  cout << "enter another floating-point number: ";
  cin >> w;
  print("v",v); print("w",w);
  u = v + w; print("v + w", u);
  u = v - w; print("v - w", u);
  u = v * w; print("v * w", u);
  u = v / w; print("v / w", u);
  // The following works for ints, chars, and doubles too:
  u += v; print("u += v", u);
  u -= v; print("u -= v", u);
  u *= v; print("u *= v", u);
  u /= v; print("u /= v", u);
} ///:~