Basic C++ question from a novice programmer -

i novice c++ programmer , trying work on school lab. below, have pasted shell of program working on. in main, instantiating object car1 belongs class velocity. when try use instantiation function mpsconverter, error indicating expression must have class type. have done similar examples in class , format worked fine. ideas? if not appropriate forum simple questions this, please point me in right direction more appropriate one.

thanks, al

// p1_2.cpp : defines entry point console application. //  #include "stdafx.h" #include <iostream> #include "conio.h" using namespace std;  class velocity {     private:         int mpsinput;       // input value: meters per second (mps)         int kmphinput;      // input value: km per hour         int mphoutput;      // output value: comverted value of km per hour miles per hour (mph)      public:         int kmphoutput;     // output value: converted value of mps km per hour         velocity();                      void mpsconverter(int speedkmph);         void mphconverter();         ~velocity(); };  velocity::velocity()        // constructor {     cout << "the initial text displayed when object in class velocity instantiated." << endl; }  void velocity::mpsconverter(int speedkmph)      // convert km per hour meters per second (mps) {     kmphoutput = (speedkmph * 2);  }  void velocity::mphconverter()       // convert km per hour miles per hour (mph) {  }  velocity::~velocity()       // destructor {  }  int main() {     velocity car1();     car1.mpsconverter(2);     getch();     return 0; } 

velocity car1(); 

the above statement isn't creation of instance car1 of type velocity. trying call declare function car1() return type velocity. since there no instance created -

car1.mpsconverter(2); // statement giving error stating mpsconverter(2)                       // can called on class types.  velocity car1 ; // right way of instance creation.