Converting numbers to strings

sprintf

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If you''re using C-style strings, use sprintf(), defined in cstdio.

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sprintf? whats that?

i want to convert datatypes here not print to a dos console

As Kent Brockman says:
"ONLY TIME WILL TELL."

sorry. my mistake. that will do fine.

My favorite is stringstream. IE)

#include<stringstream>

std::stringstream s;
float x = 0.f;
int y = 1;
double z = 0.0;

s << "Numbers are:" << x << y << z;

and when you need a string you can call s.str() to get a std::string back.

Not a usefull or pretty example but you get the point. sprintf requires you to make a guess (or know) the size of the buffer you are writing into before hand, wich can cause buffer overruns if your output ends up being longer than the buffer you allocated. You can use vsnsprintf if you really want sprintf. This function takes the size of the buffer and will return -1 in the event of an overflow situation.

--Tyson


============================
A guy, some jolt, and a whole lot of code

[edited by - tyson on August 16, 2003 10:07:01 AM]

Yes, but he said "char* not the string class provided with C++", so he'd have to use std::string::c_str() to get the const char*. Incidentally, you include sstream, not stringstream (there is no such file), for std::stringstream.

But yes, C++ string streams are sexy.

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[edited by - Lektrix on August 16, 2003 1:32:50 PM]

*cough* add to FAQ *cough*