Multi-functional calculator - VERSION ONE.

Code:
#include <stdio.h>
int getUserInput();
int main()
{
 char cOperator,
     cCarryOn,
     cAgain;
 int dFirst,
     dSecond,
     dResult;
 // printf("first is %d and second is %d", first, second);
  printf("Enter first number");
  scanf(" %d", &dFirst);
   
  printf("Enter second number");
  scanf(" %d", &dSecond);
  printf("First number is %d and second number is %d\n", dFirst, dSecond);
   
  printf("Is this what you want? (y/n)");
  scanf("  %c", &cCarryOn);
  while (cCarryOn != 'y' && cCarryOn != 'n')
  {
      printf("Type either 'y' or 'n' (without quotation marks)");
      scanf(" %c", &cCarryOn);
  }
  if (cCarryOn == 'n')
  {
      printf("Program will now start again.\n");
      main();
  }
  else
  {
      printf("OK, let's continue.\n");
  }
 
   
   printf("What operator? +, -, * or /?");
   scanf(" %c", &cOperator);
   while (cOperator != '+' &&
        cOperator != '-' &&
        cOperator != '*' &&
        cOperator != '/')
   {
     printf("Try again");
     scanf(" %c", &cOperator);
   }
   
  switch (cOperator)
  {
      case '+':
      dResult = dFirst + dSecond;
      break;
      case '-':
      dResult = dFirst - dSecond;
      break;
      case '*':
      dResult = dFirst * dSecond;
      break;
      case '/':
      dResult = dFirst / dSecond;
      break;
      default:
      printf("Ah... Something wrong happened. Program will now restart");
      main();
      break;
  }
  printf("The final answer is %d\n", dResult);
   
  printf("Perform another calculation? (y/n)");
  scanf(" %c", &cAgain);
  while (cAgain != 'y' && cAgain != 'n')
  {
      printf("Type 'y' or 'n' (without quotation marks)");
      scanf(" %c", &cAgain);
  }
  if (cAgain == 'y')
  {
      main();
  }
  else
  {
      printf("Thank you for using this calculator. Bye!");
  }
  return 0;
}

Output (Example):

WHAT I NEED TO WORK ON:

1. There seems to be a bug with stops the program from exiting after the user types 'n' when asked if (s)he wants to perform another calculation - see the red lines in the output.
2. Clean up code, make it more consistent.
3. Change the input values from type int to type double or float.
4. Add more functionality: make the user be able to input more than two numbers, add square-root and other mathematical functions, etc.

I knew most of this already beforehand as it is very similar to Java, but here are some points to note:

• scanf() sometimes requires you to add a space before the "%-" bit in the quotation marks, otherwise the program sometimes goes loopy. I honestly don't know why!