Simple question about dynamic concatenation

[Hypercomplex]

Hi,

So I have a very simple question (I'm beginner ) about concatenation with the strcat function :

I have a program in C, I want to export a .txt file containning results, I have to put the location in a char[], I have something like that =

"
.......
GetCurrentDirectory(256, file);
strcat(file,"\\log.txt");
....
"

and it works, no problem, but I'd like to export many log files so I need dynamic concatenation, something like that :


"
.......
int x = 5;
GetCurrentDirectory(256, file);
strcat(file,"\\logx.txt");
....
"

and having a log5.txt in my file, into not erasing log4.txt for exemple ... I searched with the sprintf function for cast, but I have a problem, if I do


"
.......

GetCurrentDirectory(256, fichier);
strcat(file,"\\log");
strcat(file,".txt");
....
"
It doesn't work, I don't understand why ... I want to do strcat(file,"\\log" +x+".txt" ); like in java for exemple but I don't find how to write it ... someone knows it plz ?? =)


thx

[Martin O]

... I searched with the sprintf function for cast, but I have a problem, if I do

Why do you say sprintf had a problem, then show code that has no sprintf calls??

sprintf should work. If not then post the sprintf code you tried.

But ostringstream is a better alternative to sprintf.

[Igor Vartanov]

strcat(file,"\\log");
strcat(file,".txt");
....
"
It doesn't work, I don't understand why ...

It works just fine:

#include <stdio.h>

int main()
{
	char file[260] = "C:\\some_path";
	strcat(file,"\\log");
	strcat(file,".txt"); 
	printf("&#37;s\n", file);
	return 0;
}

D:\Temp\37>37.exe

C:\some_path\log.txt