[redhead]

Here is your problem:

  int DOLLARS = 0.0;
  int  QUARTERS = 0.0;
  int  DIMES = 0.0;
  int  NICKELS = 0.0;
  int  PENNIES = 0.0;
...
  QUARTERS = (dollars * 1) /.25 ;
  DIMES = (changeamount - (dollars * 1) - (quarters * .25) / .1 );
  NICKELS = (changeamount  - (dollars * 1) - (quarters* .25) - (dimes* .1) / .05) ;
  PENNIES = (changeamount - (dollars * 1) - (quarters * .25) - (dimes * .1) - (nickels * .05)/.01) ;
...
  cout << "dollars: " << Dollars << endl;
  cout << "quarters: " << Quarters << endl;
  cout << "dimes: " << Dimes << endl;
  cout << "nickels: " << Nickels << endl;
  cout <<  "pennies: " <<Pennies<< endl;
...

First off, you're tryig to store decimal numbers into a type INT, remember for that to be accomplished the container must be of type FLOAT.

Second, when you output the result, you address totaly different variables, remember, the programming language is case sensitive.