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[King Tetiro]

King Tetiro

[C++] Integer to String and Vice Versa

Hey dudes, Im having a bit of trouble with C++ and as this is the only place I know that has people with C++, well you know.

Very simple to start off, how do I convert integer to string and string to integer?

I can grab the code I have tonight.

(This problem has taken me hours and Im still stuck, but I solve views in a matter of minutes. What's up with that?)

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[TheDarkJay]

TheDarkJay

Re: [C++] Integer to String and Vice Versa

The std::stringstream class is a typical way of doing this in C++

Code: [Select]

#include <string>
#include <sstream>

template<typename T> inline std::string ToString(const T& o)
{
     std::stringstream stream; stream << o;
     return stream.str();
}

template<typename T> inline T FromString(const std::string& s)
{
      T o; std::stringstream stream;
      stream << s; stream >> o;
      return o;
}

int main()
{
      int i = 5;
      std::string si = ToString(i);

      std::string age = "7";
      int nage = FromString<int>(age);
      return 0;
}


[MG-Zero]

MG-Zero

Re: [C++] Integer to String and Vice Versa

for string to into, the atoi() function will take care of it.  For the other way around, do what TDJ said

i love big weenies and i cannot lie

[Xiphirx]

Xiphirx

Re: [C++] Integer to String and Vice Versa

The std::stringstream class is a typical way of doing this in C++
*snip*

Couldn't you just do it like this?

Code: [Select]

#include<string>
#include<sstream>

int main()
{
std::stringstream stream;
int myInt = 9;
stream << 9;
std::string myString = "";
myString = stream.string();
return 0;
}

?

For The Swarm (StarCraft II Zerg strategy)

I whip my hair back n forth

• 

[TheDarkJay]

TheDarkJay

Re: [C++] Integer to String and Vice Versa

...that's what I did just not in their own functions? (I just copied those functions straight out of one of my own helper code collections).

for string to into, the atoi() function will take care of it.  For the other way around, do what TDJ said

If memory serves, atoi is generally considered the "C" way of doing things whilst stringstream the "++C" way. (++C being a slang-term for "screw C, we love polymorphism!) Whether or not this is a good thing is a matter of opinion xD

[King Tetiro]

King Tetiro

Re: [C++] Integer to String and Vice Versa

Okay none of the codes worked. Wtf?

• 

[Zaeranos]

Zaeranos

Re: [C++] Integer to String and Vice Versa

Did you include the right headers?

[hawthorneluke]

hawthorneluke

Re: [C++] Integer to String and Vice Versa

I doubt your computer said "none of the codes worked"
Saying exactly what did go wrong will help fix the problem a lot.

Also, trying to figure out such a common thing shouldn't take you hours.
All you have to do is use google.
You could even google exactly what you said (how do I convert integer to string and string to integer?) and probably find the answer in seconds.

この世に悪があるとすれば、それは人の心だ

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[King Tetiro]

King Tetiro

Re: [C++] Integer to String and Vice Versa

What's the 'const T& o'?

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[MG-Zero]

MG-Zero

Re: [C++] Integer to String and Vice Versa

A parameter called of type const T, which is also a reference.  I don't think that it's necessary to make it const, or a reference for that matter..unless there's some specification of the stringstream class i'm unaware of.  Can we see what your error message is?  Also, the way you're using it will be helpful.

i love big weenies and i cannot lie

[King Tetiro]

King Tetiro

Re: [C++] Integer to String and Vice Versa

I shall post it next week. Next week Im implementing better graphics

For my assignment, I've made NES styled graphics

• 

[Mamoruanime]

Mamoruanime

Re: [C++] Integer to String and Vice Versa

I'm reasonably confused as to why you're starting out with graphics in C++... That language is probably best started via console apps :\

[MG-Zero]

MG-Zero

Re: [C++] Integer to String and Vice Versa

I'm reasonably confused as to why you're starting out with graphics in C++... That language is probably best started via console apps :\

I have to second this...you're jumping around too quickly.

i love big weenies and i cannot lie

[TheDarkJay]

TheDarkJay

Re: [C++] Integer to String and Vice Versa

I'm reasonably confused as to why you're starting out with graphics in C++... That language is probably best started via console apps :\

I have to second this...you're jumping around too quickly.

Third.

You want a really good introduction to C++ game project? Look at Interactive Fiction. Ever read any of the books in the Fighting Fantasy series? Making that simple kind of text-based game makes for a great beginners project.