Implemented reverse operation method for symbols

src/inputHandler.c

@@ -19,4 +19,28 @@ int getOperationId(char symbol) {
             return 7;
     }
     return id;
-}
+}
+
+char getOperationSymbol(int id) {
+    char symbol = ' ';
+    switch (id) {
+        case 1:
+            return '+';
+        case 2:
+            return '-';
+        case 3:
+            return '/';
+        case 4:
+            return '*';
+        case 5:
+
+            return '^';
+        case 6:
+            return '%';
+
+        case 7:
+
+            return '!';
+    }
+    return symbol;
+}

src/inputHandler.h

@@ -3,4 +3,6 @@
 
 int getOperationId(char);
 
+char getOperationSymbol(int);
+
 #endif //THEADMIRALS_INPUTHANDLER_H