Convert from int to std::string

[rtrujillor]

int iAnno = 2005;
int iMes = 7;
int iDia = 23;

std::stringstream ssAnno;
ssAnno << iAnno;
std::string anno = ssAnno.str();

std::stringstream ssMes;
ssMes << iMes;
std::string mes = ssMes.str();

std::stringstream ssDia;
ssDia << iDia;
std::string dia = ssDia.str();

std::string fecha= anno + mes + dia;

 

[utab]

int iAnno = 2005;
int iMes = 7;
int iDia = 23;

std::stringstream ssAnno;
ssAnno << iAnno;
std::string anno = ssAnno.str();

std::stringstream ssMes;
ssMes << iMes;
std::string mes = ssMes.str();

std::stringstream ssDia;
ssDia << iDia;
std::string dia = ssDia.str();

std::string fecha= anno + mes + dia;

So what is the question from your side?

 

[Michael DOUBEZ]

(e-mail address removed) a écrit :

int iAnno = 2005;
int iMes = 7;
int iDia = 23;

std:stringstream os;
os<<iAnno<<"-"<<iMes<<"-"<<iDia;
std::string fecha(os.str());

And I might add <silence>.

 

[Jim Langston]

int iAnno = 2005;
int iMes = 7;
int iDia = 23;

std::stringstream ssAnno;
ssAnno << iAnno;
std::string anno = ssAnno.str();

std::stringstream ssMes;
ssMes << iMes;
std::string mes = ssMes.str();

std::stringstream ssDia;
ssDia << iDia;
std::string dia = ssDia.str();

std::string fecha= anno + mes + dia;

template<typename T, typename F > T StrmConvert( const F from )
{
std::stringstream temp;
temp << from;
T to = T();
temp >> to;
return to;
}

template<typename F> std::string StrmConvert( const F from )
{
return StrmConvert<std::string>( from );
}

int iAnno = 2005;
int iMes = 7;
int iDia = 23;

std::string fecha = StrmConvert(iAnno) + StrmConvert(iMes) +
StrmConvert(iDia);

 

[Frank Birbacher]

Hi!

template<typename T, typename F > T StrmConvert( const F from )
{
std::stringstream temp;
temp << from;
T to = T();
temp >> to;
return to;
}

template<typename F> std::string StrmConvert( const F from )
{
return StrmConvert<std::string>( from );
}

Which is a simple copy of boost::lexical_cast

Frank

 

[Christian Hackl]

Which is a simple copy of boost::lexical_cast

boost::lexical_cast also does error checking so that it can throw
boost::bad_lexical_cast. IIRC it checks failbit and whether the stream
has arrived at EOF or not (to catch cases such as "12a").

 

[Frank Birbacher]

Hi!

boost::lexical_cast also does error checking so that it can throw
boost::bad_lexical_cast. IIRC it checks failbit and whether the stream
has arrived at EOF or not (to catch cases such as "12a").

Yes, correct. It is much more sophisticated and also supports conversion
from A to B where neither is a string.

Regards, Frank