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int to String C Question

Posted on 2004-09-17
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Last Modified: 2012-06-22
Hi,

   How do I convert an integer to a string? Easiest coded example will be awarded.

I have an integer, p

want to convert p to string and send it using the following send command:

send(s, STRING, strlen(STRING), 0)

where s is a socket and STRING is int p converted to a string.
Please provide the correct code to send this int converted to string, as short and precise as possible.

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Question by:jameswalt
  • 3
5 Comments
 
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Assisted Solution

by:ankuratvb
ankuratvb earned 20 total points
ID: 12090533
Use the itoa() function
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Expert Comment

by:ankuratvb
ID: 12090535
Here's an example:
#include <stdlib.h>
#include <stdio.h>

int main(void)
{
   int number = 12345;
   char string[25];

   itoa(number, string, 10);
   printf("integer = %d string = %s\n", number, string);
   return 0;
}
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Accepted Solution

by:
CmdrRickHunter earned 30 total points
ID: 12090551
itoa is not portable.  If you have it, it is by far the most simple solution.

If you need more portable, use sprintf.

int n = 5;
char buffer[10]; /* long enough to hold your number + null */
sprintf(buffer, "%i", n);

which works should work on any system with stdio.

Also you can format it using the normal % encoding
sprintf(buffer, "%.2f", floatNumber);
for example




if you're looking to send it over a socket, you can always send it raw
send(socket, &theInt, sizeof(int));
just watch out for byte order if you're going across platforms.  hton will change the byte ordering to a "standard" networking order, which I believe is big endian
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Author Comment

by:jameswalt
ID: 12090552
Getting undefined symbol. I have the files included.
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LVL 9

Expert Comment

by:ankuratvb
ID: 12090588
Yeah,you can use sprintf() in case you dont have itoa().

sprintf() works like printf and writes to a string instead of standard output.

CmdrRickHunter has already provided an example.
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