Thread: random fill array

*sigh*

Come on man, use your head! No, that doesn't mean lay it on your keyboard. Think once in a while! Obviously the "...." was just saying "fill in what you need here". That's clearly not a valid for loop, and wasn't even intended for you to think it was.

Read the FAQ on random numbers. Read your chapter covering loops again, because clearly you slept through it. Post your actual attempt, not just the function fragment they gave you for your homework.

I suppose I'll have to start assuming everyone is even stupider than I think they are. How depressing.


Quzah.

>Read your chapter covering loops again, because clearly you slept through it.
Doh, what's a loop?

here is my full code:

i get this error on line 52: 52 naivesort.c `for' loop initial declaration used outside C99 mode

Code:

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

const int RANGE = 200; // random data used in range 0-199

// Functions
void bubble_sort (int array [], int arraySize, int * count);
void swap (int * v1, int * v2);
void fill_array (int array [], int arraySize);
void print_array(int array[], int sizeOfData);

int main()
  {
     const int arraySize = 100;
     int a[arraySize];
     int datasize = 1;
     FILE *resultsFile;
     
     // open the file for writing ("w")
     resultsFile = fopen("nsort.dat", "w");  

     if (resultsFile != NULL)      // file successfully opened
      {
         // seed the random number generator so it gives different
       // random numbers each time
       srand ( time (0) );


       // Table headings
       printf ("Found\t Data Size\t Comparisons Needed\n"  );
       
       //\t puts in a tab character, \n a new line
       fprintf (resultsFile, "Data Size\t Comparisons Needed\n"  );

       // Generate table for data of different sizes
       // giving number of comparisons each time

       for (datasize; datasize <= arraySize; datasize = datasize + 1)
		{
	  		int count = 0;  // number of comparisons this time

	  		fill_array(a, datasize);

	  		bubble_sort (a, datasize, & count);

	  		// print results in a table
          	printf("%d  \t\t\t  %d\n", datasize, count);
          	fprintf(resultsFile, "%d  \t\t\t  %d\n", datasize, count);
		}

        print_array(a, arraySize); // check final version at least was sorted

       
     }
   else
      fprintf(resultsFile, "File not opened\n");

   fclose(resultsFile); return 0;
  }
/*
void bubble_sort (int array [], int arraySize, int * count)
{
     
}*/
void swap (int * v1, int * v2)
{

}
void fill_array (int array [], int arraySize)
{
     
}
void print_array(int array[], int sizeOfData)
{
     
}

I don't see anything about line 52.

Code:

        print_array(a, arraySize); // check final version at least was sorted

stdc.c
stdc.c:5:24: warning: C++ style comments are not allowed in ISO C90
stdc.c:5:24: warning: (this will be reported only once per input file)
stdc.c: In function `main':
stdc.c:16: warning: ISO C90 forbids variable-size array `a'
stdc.c:39: warning: statement with no effect
Linking...
ide/Debug/stdc.o: In function `main':
J:/Forum/stdc.c:45: undefined reference to `bubble_sort'

> const int arraySize = 100;
> int a[arraySize];
This isn't valid C either.

It's OK in C++ and in C99, but not normal (C89) C.

Use
#define arraySize 100
int a[arraySize];