how can i convert an integer to string ?

[satellite03]

how do i convert an integer to a string ?

say,
int x = 1234;

how do i get a string from it (i.e string s = "1234") ?

how can i do it ?

 

[kaya17]

CString stri;
int i;
i=1234;
stri.Format("%d",i);

then stri will be "1234

 

[Skute]

string s = "1234";
int mynum = 0;

mynum = atoi(s.c_str());

// Now mynum is 1234

Skute

"There are 10 types of people in this World, those that understand binary, and those that don't!"

 

[satellite03]

hi, r u sure your code is giving result ? i am getting compile error.

#include<iostream>
#include<cstring>
#include<string>
using namespace std;
          
int main()
{       

CString stri;
int i;
i=1234;
stri.Format("%d",i);
cout<<stri<<endl; // show the string
    
for(int k=0;k<stri.length();k++)
cout<<stri[k]<<endl;//show each character 
}

it is giving compile error... do i need any other header.

 

[chipperMDW]

Go read the FAQ in the C++: UNIX forum.

 

[uolj]

kaya17's example uses the MFC string class called CString. Skute's example converted a string to an integer. chipperMDW's FAQ should be very helpful, but I didn't see an example. So here goes:

#include <iostream>
#include <sstream>
#include <string>

int main()
{
    int i = 1000;
    std::ostringstream theStream;
    theStream << i << " + " << 234 << " = " << i+234;

    std::string theString = theStream.str();
    std::cout << theString << std::endl; // show the string

    for (std::string::size_type k = 0; k < theString.length(); k++)
        std::cout << theString[k] << std::endl;//show each character 
}

 

[satellite03]

hi uolj, yes, exactly, it is working.

hi, can i do it in C ? C has a function itoa(). but this is non-standard. what does it mean non-standard? does it mean all compiler does not support it ?

anyway,if i leave itoa() ..is there any smart portable solution in C ?

 

[ArkM]

Standard way to go:

#include <cstdio>
char image[16];
int intvar = 1234;
sprintf(image,"%d",intvar);

Include <stdio.h> in C...

 

[nappaji]

You can use the stringstream class

#include <stringstream>

int i=100;
stringstream ss;

ss << i;

To access the string from the stringstream,
cout << ss.str() << endl;

To acccess a C-string,
cout << ss.str.c_str() << endl;