c++ add int to string code example

Example 1: c++ int to string

#include <string>
using namespace std;

int iIntAsInt = 658;
string sIntAsString = to_string(iIntAsInt);

Example 2: how to convert int to string c++

#include <iostream>  
#include<string>  
using namespace std;  
int main()  
{  
 int i=11;  
  
string str= to_string(i);  
  
cout<<"string value of integer i is :"<<str<<"\n";  

return 0;
}

Example 3: convert a int to string c++

#include <iostream>
#include<string>
using namespace std;
int main()
{
int i = 11;
float f = 12.3;
string str = to_string(i);
strinf fstr = to_string(f);
}

Example 4: int and string concatination cp[

std::string name = "John";
int age = 21;
std::string result;

// 1. with Boost
result = name + boost::lexical_cast<std::string>(age);

// 2. with C++11
result = name + std::to_string(age);

// 3. with FastFormat.Format
fastformat::fmt(result, "{0}{1}", name, age);

// 4. with FastFormat.Write
fastformat::write(result, name, age);

// 5. with the {fmt} library
result = fmt::format("{}{}", name, age);

// 6. with IOStreams
std::stringstream sstm;
sstm << name << age;
result = sstm.str();

// 7. with itoa
char numstr[21]; // enough to hold all numbers up to 64-bits
result = name + itoa(age, numstr, 10);

// 8. with sprintf
char numstr[21]; // enough to hold all numbers up to 64-bits
sprintf(numstr, "%d", age);
result = name + numstr;

// 9. with STLSoft's integer_to_string
char numstr[21]; // enough to hold all numbers up to 64-bits
result = name + stlsoft::integer_to_string(numstr, 21, age);

// 10. with STLSoft's winstl::int_to_string()
result = name + winstl::int_to_string(age);

// 11. With Poco NumberFormatter
result = name + Poco::NumberFormatter().format(age);

Example 5: how to convert int to string c++

#include <iostream>  
#include <boost/lexical_cast.hpp>  
using namespace std;  
int main()  
{  
 int i=11;  
 string str = boost::lexical_cast<string>(i);  
cout<<"string value of integer i is :"<<str<<"\n";  
  
}