Is there a better way of converting Int to std::string

monalin · #1 10-Oct-2005, 22:39

I'm curious if theres a better way of converting int data types into std::string. What I have works but i'm almost sure there's a better way of doing it. Let me know if you guys know of anything easier or any suggestions u have. Cause my way is somewhat limited.

I've tried this code and it works but its still kinda inefficiant I think its the only thing i could think of.

CPP / C++ / C Code:

#define BUFF 10

using namespace std;
int main()
{
	int i = 2001;
	int count;
	char ch[BUFF];
	string s;

	itoa(i,ch,BUFF);

	for(count=0;ch[count] != NULL; count++)
		s=s+ch[count];

	cout << s;
	return 0;
}

LuciWiz · #2 11-Oct-2005, 01:11

If you will include the string header (on some compilers there may not be the need) you can just assign the char array to the std::string, since there is an assignment operator defined for this:

CPP / C++ / C Code:

#include <string>
//...
/*
for(count=0;ch[count] != NULL; count++)
	s = s+ch[count];
*/
s = ch;

But if you don't want to use this C hack and do it the "C++ way", you can include sstream and use the stringstreams for conversion:

CPP / C++ / C Code:

#include <sstream>
using namespace std;

int main()
{
	int i = 2001;
	string s;
	ostringstream convStream;
	convStream << i;
	s = convStream.str();
	cout << s;
	return 0;
}

You can use stringstreams just like you use cin and cout. This method is actually a C++ mirror for the C sprintf method for conversion.

Best regards,
Lucian

Paramesh · #3 11-Oct-2005, 01:18

Hi monalin,

You can find more information about this in the following links:

Converting Int to a string 1
Converting int to string 2
Converting int to string 3
Converting int to string 4

Paramesh.

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Is there a better way of converting Int to std::string

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