Computer Science Canada

[Tutorial] Putting data into a string
Author:  wtd [ Mon Oct 04, 2004 5:54 pm ]
Post subject:  [Tutorial] Putting data into a string
Yesterday I wrote a tutorial on extracting data from a string using the istringstream class. Today I'll cover putting data into a string using the ostringstream class.

code:
#include <string>
#include <sstream>
#include <iostream>

int main()
{
   std::ostringstream output;
   int i = 37;
   double d = 27.42;

   output << i << d;

   std::string final_string = output.str();

   std::cout << final_string << std::endl;

   return 0;
}
Author:  rizzix [ Mon Oct 04, 2004 9:36 pm ]
Post subject: 
thats rather cool. so ehm.. would u suggest using this over sprintf/sscanf ?
Author:  wtd [ Mon Oct 04, 2004 10:11 pm ]
Post subject: 
If you're writing C code, write C (sprintf, sscanf, etc). If you're writing C++, then write C++. Smile
Author:  rizzix [ Mon Oct 04, 2004 10:20 pm ]
Post subject: 
ha well .. but i find it easier to do error checking using stdio than using iostreams.

for ex:
code:

int num;
char* str = "1000";

if (!sscanf(str, "%d", &i))
    printf("error\n");



and the syntax is a lot cleaner.. no operator overloading Razz .. although that shouldn't bug a c++ programmer a lot.. i rather like a consistent behaviour. and the c libraries tend to provide that.

but things would be different if iostream supported exceptions.
Author:  wtd [ Tue Oct 05, 2004 12:23 am ]
Post subject: 
The problem with stdio.h is the danger of buffer overflows.
Author:  Tony [ Wed Oct 06, 2004 4:15 pm ]
Post subject: 
i seem to be having trouble figuring out how to flush ostringstream Confused

:


You can syndicate this boards posts using the file backend.php or view the topic map using sitemap.php.

Terms of Use | Privacy Policy