Dave

.gitignore

@@ -14,6 +14,7 @@
 .idea/**/sqlDataSources.xml
 .idea/**/dynamic.xml
 .idea/**/uiDesigner.xml
+.DS_Store
 
 # Gradle:
 .idea/**/gradle.xml
@@ -149,7 +150,7 @@ fabric.properties
 .project
 .classpath
 .settings
-
+.DS_Store
 
 #maven build target
-target/
+target/

pom.xml

@@ -8,5 +8,13 @@
     <artifactId>scientific_calculator</artifactId>
     <version>1.0-SNAPSHOT</version>
 
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 </project>

src/main/java/com/zipcodewilmington/scientificcalculator/Basic.java

@@ -0,0 +1,52 @@
+package com.zipcodewilmington.scientificcalculator;
+
+public class Basic{
+    public static double add(double a, double b){
+        double sum = a+b;
+        return sum;
+    }
+    public static double subtract(double a, double b){
+        double difference = a-b;
+        return difference;
+
+    }
+    public static double multiply(double a, double b){
+        double product = a*b;
+        return product;
+    }
+
+    public static double divide(double a, double b){
+        double quotient = a/b;
+        return quotient;
+    }
+
+    public static double square(double a){
+        double squareResult = (double) Math.pow(a,2);
+        return squareResult;
+
+    }
+    public static double squareRoot(double a){
+        double squareRootResult = (double) Math.sqrt(a);
+        return squareRootResult;
+    }
+    public static double exponent(double a, double b){
+        double exponentResult = (double) Math.pow(a,b);
+        return exponentResult;
+    }
+    public static double inverse(double a){
+        double inverseResult = 1/a;
+        return inverseResult;
+    }
+    public static double signChange(double a){
+        double opposite = 0;
+        if (a > 0){
+            opposite = a - (2 * Math.abs(a));
+        } else if(a < 0){
+            opposite = a + (2 * Math.abs(a));
+        } else {
+            opposite = 0;
+        }
+
+        return opposite;
+    }
+}