refactoring: case(geting user input for both int and double)

src/main/c/Calculator/calculator.c

@@ -115,32 +115,16 @@ double combination(int n, int r);
             return 0.0;
     }
 }
+double getDoubleInput(const char *message) {
+    double input;
+    printf("%s", message);
+    scanf("%lf", &input);
+    return input;
+}
 
-
-
-    double power(double base, double exponent) {
-        return pow(base, exponent);
-    }
-
-    double sine(double angle) {
-        return sin(angle * M_PI / 180.0);
-    }
-
-    double cosine(double angle) {
-        return cos(angle * M_PI / 180.0);
-    }
-
-    double tangent(double angle) {
-        return tan(angle * M_PI / 180.0);
-    }
-    double permutation(int n, int r) {
-        int result = 1;
-        for (int i = 0; i < r; i++) {
-            result *= (n - i);
-        }
-        return result;
-    }
-
-    double combination(int n, int r) {
-        return permutation(n, r) / factorial(r);
-    }
+int getIntInput(const char *message) {
+    int input;
+    printf("%s", message);
+    scanf("%d", &input);
+    return input;
+}