changing an int to string?? 2

[evosix]

Hi, me again,

i know of atoi, but is there a reverse of it??

I want to change an int into a string so i can strcat it to another string.

char s1[20]; (eg: "WOW &quot
int x = 100;
//something changes 100 to a string here
strcat(s1, x);

//result should be "WOW 100"

Thanks again,

-evosix-

 

[evosix]

Ive tried using:

sprintf(s1, "%f", x);

but in this case, x would have to be a float, and ruins my output:

"WOW 100.000000"

Any suggestions??
Thanks all,

-evosix-

 

[danielhozac]

Try [tt]sprintf(s1, "%d", x);[/tt] since %d means int.

//Daniel

 

[evosix]

hehe thanks Daniel.

silly me, i thought the f in sprintf meant it had to be a float!! LOL

(Y)

 

[nappaji]

In C++, you could also use stringstream

stringstream s;
float f;
int i;

s << f << i;

To access the string from the stringstream object,
use the member function str()
s.str()

To access the C string, use s.str().c_str()

Hope this helps

 

[greedyzebra]

Should you really want to turn an int to a string, you can use the itoa() function. Info is here:

http://www.cplusplus.com/ref/cstdlib/itoa.html

 

[jstreich]

check portability itoa is NOT standard, and may not be supposrted by his compiler. In all likelyhood it is written using one of the methods posted above (string stream/sprintf).

 

[96gfeeinte]

hi,
there is no standard library function for itoa(reverse of atoi).
but u can get code for itoa function in k & ritchie text
book on C.try converting that code to c++ & use it.
i think it may help u out...

 

[PhilMumf]

This template converts anything to a string as long as it has a stream operator defined for it (apologies if there are any typos we have an ancient Sun 4.3 C++ compiler which does not have stringstream so our version uses ostrstream)

template <class T> string mlToString(T thing)
{
stringstream conv;
conv << thing << ends; // not sure if &quot;ends&quot; necessary
return conv.c_str(); // COPY for return value
}

This works for all builtin types (int, float etc) and classes which already have a stream function defined. You might find it is not perfect for float output depending on your compiler's default output format.

For any other class you want to convert, define a stream function as follows:

ostream& operator<< ( ostream& arOS, const <class> &object)
{
// not sure if the &quot;ends&quot; are necessary
arOS << object.data1 << ends;
arOS << &quot;,&quot; << ends;
arOS << object.data1 << ends;
}