char + short = char*

[SinusX]

Hello
I creating program which is genereting file names. I have to create char* as
a file name.
Name of file looks like:
char + unsigned short . char
(eg. test12.tmp)
How to conect char with short and make char* from sum
Thanks for help.

 

[Victor Bazarov]

Hello
I creating program which is genereting file names. I have to create char* as
a file name.
Name of file looks like:
char + unsigned short . char
(eg. test12.tmp)
How to conect char with short and make char* from sum

Read about 'sprintf' function. You could combine your strings and the
number by printing them into another string:

char newname[100] = {0};
sprintf(newname, "%s%d.%s", name, number, extension);

Make sure 'newname' has enough room to accommodate your combination.

HTH

Victor

 

[Sharad Kala]

Hello
I creating program which is genereting file names. I have to create char* as
a file name.
Name of file looks like:
char + unsigned short . char
(eg. test12.tmp)
How to conect char with short and make char* from sum
Thanks for help.

Something like -

int main(){
stringstream ss;
int i = 12;
ss << "temp";
ss << i;
ss << "temp";
string s;
s = ss.str(); // s is temp12temp
const char *s1 = s.c_str();
....
}

 

[Sharad Kala]

stringstream ss;

Actually this could be ostringstream.

 

[Jeff Flinn]

Something like -

int main(){
stringstream ss;
int i = 12;
ss << "temp";
ss << i;
ss << "temp";
string s;
s = ss.str(); // s is temp12temp
const char *s1 = s.c_str();

This can be unsafe as s1 is not guaranteed to be valid after the statement
terminates. either copy the chars or use as:

SomeFileOperation( s.c_str() );


Jeff F

 

[Sharad Kala]

This can be unsafe as s1 is not guaranteed to be valid after the statement
terminates. either copy the chars or use as:

SomeFileOperation( s.c_str() );

Well my intention was to tell that c_str member function of std::string class
gives a const char*.
The pointer is valid till you call some non-const member of string on s1.