inputting unknown array

[Dr Saucie]

What my program is supposed to do is take in an unknown sized array of random integers and then sort the integers and display some stats about them. Right now everything works except when im taking in my array in order for me to stop the inputting numbers i have to type a letter for the program to proceed to sort things.

heres my code:

#include<stdio.h>
#include<stdlib.h>

void sort(int arr[], int i);
void math(int arr[], int i, float *sum, float *largest, float *smallest, float *mean, int *count);

int main()
{
	int *arr;
	int i;
	int value;
	float sum, largest, smallest, mean;	
	int cap;
	int count;

	cap = 10;	
	arr = malloc(cap * sizeof(int));

	count = 0;
	
	while ( 1 == scanf ("%d", &value))
	{	
        	if ( count >= cap )
		{
			printf("\nThreshhold of %d reached ", cap);
			cap += 10;
			printf("\nIncreased array size to %d \n", cap);
			arr = (int*)realloc ( arr, cap * sizeof( int ));
          	}
         	arr[ count++ ] = value;
        }
	
	for(i=0; i<count; i++)
	{
		printf("%d ", arr[i]);
	}

	sort(arr, i);
	math(arr, i, &sum, &largest, &smallest, &mean, &count);

	printf("*arr = ");

	for( i = 0; i < count; ++i)
	{
		printf("%d ", arr[i] );
	}
	printf("\n");

	printf("The sum of the array is: %f\n", sum);
	printf("Largest: %f\n", largest);
	printf("Smallest: %f\n", smallest);
	printf("Mean: %f\n", mean);
	
	free( arr );
	return 0;
}

void sort(int arr[], int i)
{
	int k;
	int bound = i-1;
	int t;
	int last_swap;
  
	while (bound) 
	{
		last_swap = 0;
		for ( k=0; k<bound; k++ )
		{
			t = arr[k];
			if ( t > arr[k+1] ) 
			{
				arr[k] = arr[k+1];
				arr[k+1] = t;
				last_swap = k;
			}
		}
		bound=last_swap;        
	}
}

void math(int arr[], int i, float *sum, float *largest, float *smallest, float *mean, int *count)
{

		
	for(i=0; i<*count; i++)
	{
		*sum = arr[i] + *sum;
	}
	
		
	*largest= arr[0];
	for(i=0; i<*count; i++)
	{
		if(arr[i]>*largest)
		{
			*largest = arr[i];
		}
	}
	
	*smallest = arr[0];
	for(i=0; i<*count; i++)
	{
		if(arr[i]<*smallest)
		{
			*smallest = arr[i];
		}
	}
	
	*mean = *sum/10;

}

[MK27]

Right now everything works except when im taking in my array in order for me to stop the inputting numbers i have to type a letter for the program to proceed to sort things.

And you would prefer that the program magically and correctly guess when you are done?

[Dr Saucie]

well i have tried a few things but what ever I do messes up the program even more, Im just looking for some advice on what to do NOT THE ANSWER!

[MK27]

well i have tried a few things but what ever I do messes up the program even more, Im just looking for some advice on what to do NOT THE ANSWER!

You mean you have tried a few things to see if you can get it to magically guess the answer?

I'm sorry, I'm not trying to tease you. I just do not understand what your problem or question is: do you want a better idea, other than entering the letter at the end?

IMO there probably isn't one. Using a clearly defined "DONE" signal is simple (simple is always better than unnecessarily complicated) for the programmer and simple and easy for the user. It's the equivalent of filling in a form on a web page and pressing "submit" to indicate you have entered all the data.

The only thing you might want to add for a finished app is a confirm dialogue, like "Are you sure you are done?".