Wednesday, May 8, 2013

Convert an Integer into a String in c++

3:15 PM

Convert an Integer into a String  in c++





using namespace std;
#include <string>
#include <sstream>
#include <iostream>

template <class T>
std::string to_string(T t, std::ios_base & (*f)(std::ios_base&))
{
std::ostringstream oss;
oss << f << t;
return oss.str();
}

int main()
{
// the second parameter of to_string() should be one of
// std::hex, std::dec or std::oct
std::cout<<to_string<long>(123456, std::hex)<<std::endl;
std::cout<<to_string<long>(123456, std::oct)<<std::endl;
system("pause");
return 0;
}

----------------------------------------------------------



string to numeric



float stof(const string& str, size_t *idx = 0);double stod(const string& str, size_t *idx = 0);long double stold(const string& str, size_t *idx = 0);int stoi(const string& str, size_t *idx = 0, int base = 10);long stol(const string& str, size_t *idx = 0, int base = 10);unsigned long stoul(const string& str, size_t *idx = 0, int base = 10);long long stoll(const string& str, size_t *idx = 0, int base = 10);unsigned long long stoull(const string& str, size_t *idx = 0, int base = 10);











numeric to string


string to_string(int val);
string to_string(unsigned val);
string to_string(long val);
string to_string(unsigned long val);
string to_string(long long val);
string to_string(unsigned long long val);
string to_string(float val);
string to_string(double val);
string to_string(long double val);



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