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C and C++ Timesaving Tips

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Join Date: Oct 2004

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vegaseat

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Re: C and C++ Timesaving Tips

#21

Aug 29th, 2005

Put a newline at the end of the file ...
Didn't give me the extra 10.
Why should a newline give an extra 10?

May 'the Google' be with you!

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Re: C and C++ Timesaving Tips

#22

Sep 9th, 2005

Something is not right.

When I use:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
void fum(int *array, size_t size)
{
   size_t i;
   /* Initialize array. */
   for ( i = 0; i < size; ++i )
   {
      array[i] = i;
   }
   /* Perform calculations. */
   for ( i = 0; i < size; ++i )
   {
      array[i] *= 2;
   }
   /* Print array. */
   for ( i = 0; i < size; ++i )
   {
      printf("%d,", array[i]);
   }
   putchar('\n');
}
 
int main(void)
{
   int myarray[25];
   foo();
   bar();
   baz();
   qux();
   fum(myarray, ARRAYSIZE(myarray));
   return 0;
}
void fum(int *array, size_t size)
{
   size_t i;
   /* Initialize array. */
   for ( i = 0; i < size; ++i )
   {
      array[i] = i;
   }
   /* Perform calculations. */
   for ( i = 0; i < size; ++i )
   {
      array[i] *= 2;
   }
   /* Print array. */
   for ( i = 0; i < size; ++i )
   {
      printf("%d,", array[i]);
   }
   putchar('\n');
}

int main(void)
{
   int myarray[25];
   foo();
   bar();
   baz();
   qux();
   fum(myarray, ARRAYSIZE(myarray));
   return 0;
}

<< moderator edit: added [code][/code] tags and indenting >>

I have several errors. This is the exact replica of one of the posts above.
I don't understand where is the mistake as all looks ok.

Thanks,
Steven Dale

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long time no c

Re: C and C++ Timesaving Tips

#23

Sep 9th, 2005

That is a snippet. Did you copy and paste all of those parts together and #include <stdio.h>?

[edit]Or pick just the necessary parts for one of them?

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <stdio.h>
 
#define ARRAYSIZE(x)  (sizeof(x)/sizeof(*(x)))
 
void fum(int *array, size_t size)
{
   size_t i;
   /* Initialize array. */
   for ( i = 0; i < size; ++i )
   {
      array[i] = i;
   }
   /* Perform calculations. */
   for ( i = 0; i < size; ++i )
   {
      array[i] *= 2;
   }
   /* Print array. */
   for ( i = 0; i < size; ++i )
   {
      printf("%d,", array[i]);
   }
   putchar('\n');
}
 
int main(void)
{
   int myarray[25];
   fum(myarray, ARRAYSIZE(myarray));
   return 0;
}
 
/* my output
0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,
*/
#include <stdio.h>

#define ARRAYSIZE(x)  (sizeof(x)/sizeof(*(x)))

void fum(int *array, size_t size)
{
   size_t i;
   /* Initialize array. */
   for ( i = 0; i < size; ++i )
   {
      array[i] = i;
   }
   /* Perform calculations. */
   for ( i = 0; i < size; ++i )
   {
      array[i] *= 2;
   }
   /* Print array. */
   for ( i = 0; i < size; ++i )
   {
      printf("%d,", array[i]);
   }
   putchar('\n');
}

int main(void)
{
   int myarray[25];
   fum(myarray, ARRAYSIZE(myarray));
   return 0;
}

/* my output
0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,
*/

"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand

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Re: C and C++ Timesaving Tips

#24

Sep 9th, 2005

copy-paste

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Re: C and C++ Timesaving Tips

#25

Sep 15th, 2005

What is the use of size_t . When we can use int for the same work to do.

Ashwin Perti

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Re: C and C++ Timesaving Tips

#26

Sep 15th, 2005

A size_t is an unsigned integral type which is the result of the sizeof operator. The two are designed to go together. To me it's the type most suited to indexing an array (you don't need negative indexes, do you?).

Sure you could use an int and it will be correct 99.999% of the time -- I was just going for 100%. Plus, with an array of ints, I find it easier to see the index from the data if they're not just slopped together.

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Re: C and C++ Timesaving Tips

#27

Sep 16th, 2005

I could not understand how exactly we can change the dimension of the array dynamically. Size once taken cannot be changed during the course of the program.

Ashwin Perti

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Re: C and C++ Timesaving Tips

#28

Sep 16th, 2005

It is not in regard to changing an array's size dynamically. It is in regard to recompiling on different systems.

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Re: C and C++ Timesaving Tips

#29

Sep 19th, 2005

I think you ppl lost me there. I am not a wizard, however I do used to belive you can change the size during the program is running .

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