Create calculator.h

Author: Quincy

3.0/calculator.h

@@ -0,0 +1,13 @@
+#include <string>
+#pragma once
+
+class calculate
+{
+public:
+	std::string add(double numA, double numB);
+	std::string subtract(double numA, double numB);
+	std::string multiply(double numA, double numB);
+	std::string divide(double numA, double numB);
+	std::string power(double numA, double numB);
+	std::string square(double numA, double numB);
+};