The ++ and -- operators.

posted Feb 11, 2013, 12:53 AM by Karwan Jacksi   [ updated Feb 11, 2013, 12:54 AM ]
// This program demonstrates the ++ and -- operators.

#include <iostream>
using namespace std;

int main()
{
int num = 4; // num starts out with 4

// Display the value in num
cout << "The variable num is " << num << endl;
cout << "I will now increment num.\n\n";
// Use postfix ++ to increment num
num++;
cout << "Now the variable num is " << num << endl;
cout << "I will increment num again.\n\n";

// Use prefix ++ to increment num
++num;
cout << "Now the variable num is " << num << endl;
cout << "I will now decrement num.\n\n";

// Use postfix -- to decrement num
num--;
cout << "Now the variable num is " << num << endl;
cout << "I will decrement num again.\n\n";

// Use prefix -- to increment num
--num;
cout << "Now the variable num is " << num << endl;
return 0;
}

Program Output
The variable num is 4
I will now increment num.

Now the variable num is 5
I will increment num again.

Now the variable num is 6
I will now decrement num.

Now the variable num is 5
I will decrement num again.

Now the variable num is 4

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