bartolomeus-649 / stack-based-calculator

A fully functional stack-based calculator using C++.

Stack-based Calculator

A fully functional calculator that solves infix mathematical expressions that are represented in a string, tranforms it to postfix expressions and then calculates its result using two stacks, one for operands and the other for the operations.

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Valid operations:

• Basic operations like addition, subtraction, multiplication, and division.
• Using parenthesis in expressions.

The Infix Expression: 1+2+(55)*(3/4*(99))+3*4
The Postfix Expression for the input is: 1 2 + 55 3 4 / 99 * * + 3 4 * +   
result = 4098.75

• Power of both floating point and integer numbers.

The Infix Expression: (1+2*3)^2
The Postfix Expression for the input is: 1 2 3 * + 2 ^
result = 49

The Infix Expression: 2.3^3
The Postfix Expression for the input is: 2.3 3 ^
result = 12.167

• Factorial (calculating factorial using a simple dynamic-programming function).

 The Infix Expression: 9!/8!
 The Postfix Expression for the input is: 362880 40320 /
 result = 9

• Percentage.

The Infix Expression: 12%*12%
The Postfix Expression for the input is: 0.12 0.12 *
result = 0.0144

• Using e (Euler's Number) and PI.

The Infix Expression: e^3
The Postfix Expression for the input is: 2.71828182845905 3 ^
result = 20.0855369231877

The Infix Expression: 3*PI/4
The Postfix Expression for the input is: 3 3.14159265358979 * 4 /
result = 2.35619449019234

• tan, sin, cos (whether in radians or degrees as the user specifies in the start of the program).

The Infix Expression: tan45 + sin30 + cos60
The Postfix Expression for the input is: 1 0.5 + 0.5 +
result = 2

• Square root.

The Infix Expression: sqrt100/sqrt25
The Postfix Expression for the input is: 10 5 /
result = 2