Thread: Functions- newbie nedds rescue

Help me please (I will master C yet!!) . Soon I will have 2 weeks to master the syntax and functions but now I need help.
Right now I cannot even see how the rest of my coding is because when I execute, the program jumps right to the default case of the switch and regardless of input keep doing so. Any help with this (and any and all the error I cannot see or debug because of this) would be appreciated.

Code:

#include <stdio.h>
int addint (int x, int y);
int subint (int x, int y);
int multint (int x, int y);
int divideint (int x, int y);
int powerint (int x, int y);
int gcdint (int x, int y);
int factorial (int x);

int main()
{
int x=0;
int y=0;
char select;
printf("This program will perform one of the following operations \n");
printf("to two numbers based on your selection from the following menu: \n \n");
printf("1. Add two integers. \n");
printf("2. Subtract two intergers. \n");
printf("3. Multiply two integers. \n");
printf("4. Divide two integers. \n");
printf("5. Calculate integer raised to a positive power. \n");
printf("6. Compute greatest common divisor of two integers. \n");
printf("7. Compute the factorial of an integer. \n \n");
printf("To quit the program at any time, please press q or Q. \n \n");
printf("Please enter two integers: \n\n");
scanf("%d", &x);
printf("\n ");
scanf("%d", &y);
printf("\n ");
printf("Please choose desired operation from above menu. \n  \n");
scanf("%c", &select);
  while (select != 'q' && select != 'Q')
  {
	switch (select)
	{
	case '1':
	  printf("The sum of  %d and  %d is  %d.", x, y,addint(x,y));
	  break;

    case '2':
	  printf("%d minus  %d is  %d", x, y, subint(x,y));
	  break;

	case '3':
	  printf("%d multiplied by  %d is  %d", x, y, multint(x,y));
	  break;

	case '4':
	  printf(" %d divided by %d is   %d", x, y, divideint(x,y));
	  break;

	case '5': 
		printf(" %d raised to %d is  %d", x, y, powerint(x,y));
		break;

	case '6':
	    printf("The greatest common denominator of %d and %d is %d", x, y, gcdint(x,y));
		break;

	case '7':
		printf(" The value of the factorial for %d is    %d", x, factorial(x));
        break;

    default:
		printf("Incorrect value entered, please reenter.\n \n ");
		break;
	
	}
 
printf("This program will perform one of the following operations \n");
printf("to two numbers based on your selection from the following menu: \n \n");
printf("1. Add two integers. \n");
printf("2. Subtract two intergers. \n");
printf("3. Multiply two integers. \n");
printf("4. Divide two integers. \n");
printf("5. Calculate integer raised to a positive power. \n");
printf("6. Compute greatest common divisor of two integers. \n");
printf("7. Compute the factorial of an integer. \n \n");
printf("To quit the program at any time, please press q or Q. \n \n");
printf("Please enter two integers: \n\n");
scanf("%d", &x);
printf("\n ");
scanf("%d", &y);
printf("\n ");
printf("Please choose desired operation from above menu. \n \n");
scanf("%c", &select);
  }

  printf("You have terminated the program.");
  return 0;
}

	int addint (int x, int y)
	{
	 return x + y;	  
	}

	int subint (int x, int y)
	{
	  return x - y;

	}

	int multint (int x, int y)
	{ 
	  return x * y;
	}

	int divideint (int x, int y)
	{
		if (y > 0 || y<0)
		 return x/y;
		else 
		printf("Error - division by O.\n");

	}

	int powerint (int x, int y)
	{
		if (y==1)
			return 1;
		else 
		if (y<0)
		 printf("You cannot raise a number to a negative power!\n");
		else 
		 return  x * powerint(x, y-1);
	
	}

	int gcdint (int x, int y )
	{  /* will add this function in */
	}

	int factorial (int x)
	{
		if (x >= 0)
		 return  x * factorial (x-1);
		else 
		if (x<0)
		  printf("Error, negative factorial value entered.");
	}

Thank you,

Signed frustrated but will work through it !!!!

Try to see what's the value stored in the variable select. In all probabilities it'll be a newline character.
Have to hurry with my own code otherwise would have given you the code, for now kindly do with the hint.

First off, you have your int values in enclosed in ' ' marks. Secondly, I see that you have the same menu output thingy written out in code TWICE. You should never have to do this....Usually it's a better idea to create a function to do this and just go ahead and call the guy if you need to keep re-using code. Thirdly, I noticed you said at some point: "You cannot raise a number to a negative power," which made me laugh.

You most certainly can raise a number to a negative power, with great ease. Say we raise:
5^-3

It would simply be: 1/(5^3), or 1/125. You can easily make your program do the float division to get the answer.

Still am puzzled!! added a printf to code right before switch to see what "select" had stored. It came back with nothing ??!! What am I missing or should I try to correct this??

Thanks,

Sorry, I should have posted the revised code with the changes I made-- I have taken out the printf's with the newlines and it is still giving me trouble. I will repost the code soon.