Create project of calculator

.gitignore

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+build

.travis.yml

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+language: cpp
+only: 
+  - calculator
+
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - gcc-4.9
+    - g++-4.9
+
+script:
+  - mkdir build && cd build && g++ -std=c++0x -o Calculator ../CalculatorSources/Source.cpp ../CalculatorSources/Calculator.cpp
+
+notifications:
+  email:
+    - valera.malkof@gmail.com

CalculatorSources/Calculator.cpp

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+#include"Calculator.h"
+double Calculator::calculate(const char* s)
+{
+	char strochka[255];
+	Stack<char> operations;
+	int i = 0;
+	while (*s)
+	{
+		while (!isCorrect(*s))s++;
+		if (isdigit(*s))
+		{
+			while (*s == '.' || isdigit(*s))
+			{
+				strochka[i] = *s;
+				i++;
+				s++;
+			}
+			strochka[i] = ' ';
+			i++;
+			if (!operations.isEmpty())
+			{
+				if (*s != '^'&&*s != '*'&&*s != '/')
+				{
+					if (operations.popReturn() == '-')
+					{
+						strochka[i] = operations.pop();
+						i++;
+					}
+				}
+
+			}
+		}
+		else if (*s == ')')
+		{
+
+			while (operations.popReturn() != '(')
+			{
+				strochka[i] = operations.pop();
+				i++;
+			}
+			s++;
+			if (*s == '^')
+			{
+				operations.push(*s);
+				s++;
+				if (isdigit(*s))
+				{
+					while (*s == '.' || isdigit(*s))
+					{
+						strochka[i] = *s;
+						i++;
+						s++;
+					}
+				}
+				strochka[i] = operations.pop();
+				i++;
+			}
+            if (*s == '/')
+            {
+                operations.push(*s);
+                s++;
+                if (isdigit(*s))
+                {
+                    while (*s == '.' || isdigit(*s))
+                    {
+                        strochka[i] = *s;
+                        i++;
+                        s++;
+                    }
+                }
+                strochka[i] = operations.pop();
+                i++;
+            }
+            if (*s == '*')
+            {
+                operations.push(*s);
+                s++;
+                if (isdigit(*s))
+                {
+                    while (*s == '.' || isdigit(*s))
+                    {
+                        strochka[i] = *s;
+                        i++;
+                        s++;
+                    }
+                }
+                strochka[i] = operations.pop();
+                i++;
+            }
+			operations.pop();
+			if (!operations.isEmpty())
+			{
+				if (operations.popReturn() == '*' || operations.popReturn() == '/' || operations.popReturn() == '-')
+				{
+					strochka[i] = operations.pop();
+					i++;
+				}
+			}
+
+			strochka[i] = ' ';
+			i++;
+		}
+		else if (*s == '(')
+		{
+			operations.push(*s);
+			s++;
+		}
+		else if (*s == '*' || *s == '/' || *s == '^')
+		{
+			operations.push(*s);
+			s++;
+		}
+		else if (*s == '+' || *s == '-')
+		{
+			char op;
+			if (!operations.isEmpty())
+			{
+				if (operations.popReturn() == '*' || operations.popReturn() == '/' || operations.popReturn() == '^')
+				{
+					while (!operations.isEmpty())
+					{
+						if (operations.popReturn() == '*' || operations.popReturn() == '/' || operations.popReturn() == '^')
+						{
+							strochka[i] = operations.pop();
+							i++;
+						}
+						else break;
+					}
+					operations.push(*s);
+					s++;
+				}
+				else
+				{
+					operations.push(*s);
+					s++;
+				}
+			}
+			else
+			{
+				operations.push(*s);
+				s++;
+			}
+		}
+	}
+	while (!operations.isEmpty())
+	{
+
+		strochka[i] = operations.pop();
+		i++;
+	}
+	if (strochka[i - 1] == ' ')
+		strochka[i - 1] = '\0';
+	else strochka[i] = '\0';
+	cout << endl;
+	return postFix(strochka);
+}
+double Calculator::postFix(const char* s)
+{
+	double a = 0;
+	double b = 0;
+	Stack<double> numbers;
+	while (*s)
+	{
+		while (!isCorrect(*s))s++;
+		if (isdigit(*s))
+		{
+			double d = atof(s);
+			numbers.push(d);
+			while (*s == '.' || isdigit(*s))s++;
+		}
+		else if (*s == '+')
+		{
+			b = numbers.pop();
+			a = numbers.pop();
+			numbers.push(a + b);
+			s++;
+
+		}
+		else if (*s == '-')
+		{
+			b = numbers.pop();
+			a = numbers.pop();
+			numbers.push(a - b);
+			s++;
+		}
+		else if (*s == '*')
+		{
+			b = numbers.pop();
+			a = numbers.pop();
+			numbers.push(a * b);
+			s++;
+		}
+		else if (*s == '/')
+		{
+			b = numbers.pop();
+			a = numbers.pop();
+			numbers.push(a / b);
+			s++;
+		}
+		else if (*s == '^')
+		{
+			b = numbers.pop();
+			a = numbers.pop();
+			numbers.push(pow(a, b));
+			s++;
+		}
+	}
+
+	return numbers.pop();
+}
+bool Calculator::isCorrect(const char s)
+{
+	return isdigit(s) || s == '.' ||
+		s == '+' || s == '-' || s == '*' ||
+		s == '/' || s == '^' || s == '(' ||
+		s == ')';
+}

CalculatorSources/Calculator.h

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+#ifndef CALCULATOR_H
+#define CALCULATOR_H
+#include"Stack.h"
+#include<iostream>
+#include <cmath>
+using namespace std;
+class Calculator
+{
+public:
+	static double calculate(const char* s);
+private:
+	static double postFix(const char* s);
+	static bool isCorrect(const char s);
+};
+
+#endif;