Calculator

Calculator

@@ -0,0 +1,110 @@
+// C++ program to implement
+// the above approach
+#include <iostream>
+#include <math.h>
+using namespace std;
+
+// Class calculator
+class Calculator
+{
+float a, b;
+public:
+
+	// Function to take input
+	// from user
+	void result()
+	{
+		cout << "Enter First Number: ";
+		cin >> a;
+		cout << "Enter Second Number: ";
+		cin >> b;
+	}
+
+	// Function to add two numbers
+	float add()
+	{
+		return a + b;
+	}
+
+	// Function to subtract two numbers
+	float sub()
+	{
+		return a - b;
+	}
+
+	// Function to multiply two numbers
+	float mul()
+	{
+		return a * b;
+	}
+
+	// Function to divide two numbers
+	float div()
+	{
+		if (b == 0)
+		{
+			cout << "Division By Zero" <<
+					endl;
+			return INFINITY;
+		}
+		else
+		{
+			return a / b;
+		}
+	}
+};
+
+// Driver code
+int main()
+{
+	int ch;
+	Calculator c;
+	cout << "Enter 1 to Add 2 Numbers" <<
+			"\nEnter 2 to Subtract 2 Numbers" <<
+			"\nEnter 3 to Multiply 2 Numbers" <<
+			"\nEnter 4 to Divide 2 Numbers" <<
+			"\nEnter 0 To Exit";
+
+	do
+	{
+		cout << "\nEnter Choice: ";
+		cin >> ch;
+		switch (ch)
+		{
+		case 1:
+
+			// result function invoked
+			c.result();	
+
+			// add function to calculate sum
+			cout << "Result: " <<
+					c.add() << endl;
+			break;
+		case 2:
+
+			// sub function to calculate
+			// difference
+			c.result();
+			cout << "Result: " <<
+					c.sub() << endl;
+			break;
+		case 3:
+			c.result();
+
+			// mul function to calculate product
+			cout << "Result: " <<
+					c.mul() << endl;
+			break;
+		case 4:
+			c.result();
+
+			// div function to calculate division
+			cout << "Result: " <<
+					c.div() << endl;
+			break;
+		}
+
+	} while (ch >= 1 && ch <= 4);
+
+	return 0;
+}