Fixed code not computing the special operation properly

input_resolver.cpp

@@ -47,10 +47,10 @@ ValidationResult validate_token(const std::string &token)
 
     
     if (digitpos == -1)
-        return {true, ' ', 0};
+        return {true, token[0], 0};
 
     int next = stoi(token.substr(digitpos));
-    return {true, ' ', next};
+    return {true, token[0], next};
 }
 
 Command resolveCommand()
@@ -72,7 +72,7 @@ Command resolveCommand()
 
     for (const char c: token)
     {
-        static const std::string operators {"+-*/%"};
+        static const std::string operators {"+-*/%$"};
         if(operators.find(c) != operators.npos)
         {
             operation = c;