c# - Cannot find symbol for method -

i have never had problem before, don't know why doing this. trying call on method.calctonsco2(); giving me cannot find symbol error. know method exists , not making typos... whats going on

main method tester:

public class co2footprintv1tester {     public static void main (string[] args)     {         //declaration of variables         double gals, tons, pounds;          //initialization                 co2footprintv1tester footprint = new co2footprintv1tester();          //methods         footprint.calctonsco2();         footprint5.converttonstopoundsco2();         tons = footprint.gettonsco2();         pounds = footprint.getpoundsco2();     } } 

main method class:

public class co2footprintv1 {        //declaration of private instance variables     private double mygallonsused;      private double mytonsco2;     private double mypoundsco2;      /**      * constructor ojbects of type co2footprintv1      * @param gals gallons used      *       */      co2footprintv1 (double gals)     {                 mygallonsused = gals;     }      /**      *  method calculate tons of co2      */     public void calctonsco2()     {         mytonsco2 = (8.78 * math.pow(10 , -3)) * mygallonsused;             }      /**      * method convert tons pounds      */     public void converttonstopoundsco2()     {         mypoundsco2 = mygallonsused * 2204.62;     }      /**      * method mytonsco2 private instance      */     public double gettonsco2()     {         return mytonsco2;     }      /**      * method mypoundsco2 private instance      */     public double getpoundsco2()     {         return mypoundsco2;     } } 

well not sure particular programming language using calctonsco2() method defined on co2footprintv1 class trying call on instance of co2footprintv1tester class.

public class co2footprintv1  {     ....... public void calctonsco2() {     mytonsco2 = (8.78 * math.pow(10 , -3)) * mygallonsused;  }   .... } 

you calling

co2footprintv1tester footprint = new co2footprintv1tester(); footprint.calctonsco2(); 

it should rather be

co2footprintv1 footprint = new co2footprintv1(); footprint.calctonsco2();