Extra Credit

Calculator

Objective: 

Create a scientific calculator.  It should behave like any other scientific calculator where the user presses keys and stuff happens.  This must have a graphical user interface (GUI), and include the following features:

• Current total display
• Number pad
• Arithmetic functions
• Addition
• Subtraction
• Multiplication
• Division
• You may disregard order of operations
• Trigonometric functions
• Sine
• Cosine
• Tangent
• Arcsine
• Arccosine
• Arctangent
• Additional mathematic functions
• Exponent
• Square root
• Logarithm
• Additional functions
• Clear – Zeroes out the current total
• Equals – Gives the running total

Furthermore every time a user enters a number first it should set the running total to said number.  If an operation is entered then that operation is applied to the current total.  If it is a binary operation like addition, subtraction, multiplication, division, and exponent then the following number will be the second number in that function, and applied as soon as the user presses equals.