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Reference

• C library:

  • <cassert> (assert.h)
  • <cctype> (ctype.h)
  • <cerrno> (errno.h)
  • C++11
    <cfenv> (fenv.h)
  • <cfloat> (float.h)
  • C++11
    <cinttypes> (inttypes.h)
  • <ciso646> (iso646.h)
  • <climits> (limits.h)
  • <clocale> (locale.h)
  • <cmath> (math.h)
  • <csetjmp> (setjmp.h)
  • <csignal> (signal.h)
  • <cstdarg> (stdarg.h)
  • C++11
    <cstdbool> (stdbool.h)
  • <cstddef> (stddef.h)
  • C++11
    <cstdint> (stdint.h)
  • <cstdio> (stdio.h)
  • <cstdlib> (stdlib.h)
  • <cstring> (string.h)
  • C++11
    <ctgmath> (tgmath.h)
  • <ctime> (time.h)
  • C++11
    <cuchar> (uchar.h)
  • <cwchar> (wchar.h)
  • <cwctype> (wctype.h)

• Containers:

  • C++11
    <array>
  • <deque>
  • C++11
    <forward_list>
  • <list>
  • <map>
  • <queue>
  • <set>
  • <stack>
  • C++11
    <unordered_map>
  • C++11
    <unordered_set>
  • <vector>

• Input/Output:

  • <fstream>
  • <iomanip>
  • <ios>
  • <iosfwd>
  • <iostream>
  • <istream>
  • <ostream>
  • <sstream>
  • <streambuf>

• Multi-threading:

  • C++11
    <atomic>
  • C++11
    <condition_variable>
  • C++11
    <future>
  • C++11
    <mutex>
  • C++11
    <thread>

• Other:

  • <algorithm>
  • <bitset>
  • C++11
    <chrono>
  • C++11
    <codecvt>
  • <complex>
  • <exception>
  • <functional>
  • C++11
    <initializer_list>
  • <iterator>
  • <limits>
  • <locale>
  • <memory>
  • <new>
  • <numeric>
  • C++11
    <random>
  • C++11
    <ratio>
  • C++11
    <regex>
  • <stdexcept>
  • <string>
  • C++11
    <system_error>
  • C++11
    <tuple>
  • C++11
    <type_traits>
  • C++11
    <typeindex>
  • <typeinfo>
  • <utility>
  • <valarray>

<string>

• class templates

  • basic_string
  • char_traits

• classes

  • string
  • C++11
    u16string
  • C++11
    u32string
  • wstring

• functions

  • C++11
    stod
  • C++11
    stof
  • C++11
    stoi
  • C++11
    stol
  • C++11
    stold
  • C++11
    stoll
  • C++11
    stoul
  • C++11
    stoull
  • C++11
    to_string
  • C++11
    to_wstring

string

• string::~string
• string::string

• member functions

  • string::append
  • string::assign
  • string::at
  • C++11
    string::back
  • string::begin
  • string::c_str
  • string::capacity
  • C++11
    string::cbegin
  • C++11
    string::cend
  • string::clear
  • string::compare
  • string::copy
  • C++11
    string::crbegin
  • C++11
    string::crend
  • string::data
  • string::empty
  • string::end
  • string::erase
  • string::find
  • string::find_first_not_of
  • string::find_first_of
  • string::find_last_not_of
  • string::find_last_of
  • C++11
    string::front
  • string::get_allocator
  • string::insert
  • string::length
  • string::max_size
  • string::operator[]
  • string::operator+=
  • string::operator=
  • C++11
    string::pop_back
  • string::push_back
  • string::rbegin
  • string::rend
  • string::replace
  • string::reserve
  • string::resize
  • string::rfind
  • C++11
    string::shrink_to_fit
  • string::size
  • string::substr
  • string::swap

• member constants

  • string::npos

• non-member overloads

  • getline (string)
  • operator+ (string)
  • operator<< (string)
  • operator>> (string)
  • relational operators (string)
  • swap (string)

std::string::empty

bool empty() const;

bool empty() const noexcept;

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// string::empty
#include <iostream>
#include <string>

int main ()
{
  std::string content;
  std::string line;
  std::cout << "Please introduce a text. Enter an empty line to finish:\n";
  do {
    getline(std::cin,line);
    content += line + '\n';
  } while (!line.empty());
  std::cout << "The text you introduced was:\n" << content;
  return 0;
}