string::append appening twice

[Rahul]

Hi Everyone,

I have the following code,

char temp[1024];
sprintf(temp,"_%d_%d",type,value);
FileName.append(temp); //<file_name>_1_2

however, i noticed that _1_2 is appended twice and i get an output
of <file_name>_1_2_1_2 instead of just <file_name>_1_2.
Is there any side effect to the append member function call?

Thanks in advance ! ! !

 

[Neelesh]

Hi Everyone,

 I have the following code,

                                char temp[1024];
                                sprintf(temp,"_%d_%d",type,value);
                                FileName.append(temp); //<file_name>_1_2

   however, i noticed that _1_2 is appended twice and i get an output
of <file_name>_1_2_1_2 instead of just <file_name>_1_2.
Is there any side effect to the append member function call?

 Thanks in advance ! ! !

Please post the exact code that shows this issue. The following code
does exactly what you have asked and it also prints exactly what you
want.

#include <cstdio>
#include <iostream>
#include <string>
using namespace std;

int main()
{
int type = 1;
int value = 2;
char temp[1024];
sprintf(temp,"_%d_%d",type,value);
string FileName = "hello.txt";
FileName.append(temp);
cout << FileName << endl;
}