// Fig. 1.2: fig01_02.cpp
// A first program in C++
#include <iostream>

int main()
{
   std::cout << "Welcome to C++!\n";

   return 0;      // indicate that program ended successfully
}

// Fig. 1.4: fig01_04.cpp
// Printing a line with multiple statements
#include <iostream>

int main()
{
   std::cout << "Welcome ";
   std::cout << "to C++!\n";

   return 0;   // indicate that program ended successfully
}

// Fig. 1.5: fig01_05.cpp
// Printing multiple lines with a single statement
#include <iostream>

int main()
{
   std::cout << "Welcome\nto\n\nC++!\n";

   return 0;   // indicate that program ended successfully
}

// Fig. 1.6: fig01_06.cpp
// Addition program
#include <iostream>

int main()
{
   int integer1, integer2, sum;           // declaration

   std::cout << "Enter first integer\n";  // prompt
   std::cin >> integer1;                  // read an integer
   std::cout << "Enter second integer\n"; // prompt
   std::cin >> integer2;                  // read an integer
   sum = integer1 + integer2;             // assignment of sum
   std::cout << "Sum is " << sum << std::endl; // print sum

   return 0;   // indicate that program ended successfully
}  

// Fig. 1.14: fig01_14.cpp
// Using if statements, relational
// operators, and equality operators
#include <iostream>

using std::cout;  // program uses cout
using std::cin;   // program uses cin
using std::endl;  // program uses endl

int main()
{
   int num1, num2;

   cout << "Enter two integers, and I will tell you\n"
        << "the relationships they satisfy: ";
   cin >> num1 >> num2;   // read two integers

   if ( num1 == num2 )
      cout << num1 << " is equal to " << num2 << endl;

   if ( num1 != num2 )
      cout << num1 << " is not equal to " << num2 << endl;

   if ( num1 < num2 )
      cout << num1 << " is less than " << num2 << endl;

   if ( num1 > num2 )
      cout << num1 << " is greater than " << num2 << endl;

   if ( num1 <= num2 )
      cout << num1 << " is less than or equal to "
           << num2 << endl;

   if ( num1 >= num2 )
      cout << num1 << " is greater than or equal to "
           << num2 << endl;

   return 0;   // indicate that program ended successfully
}