#include <iostream> #include <string> int main() { std::string s("Exemplary"); char& f1 = s.front(); f1 = 'e'; std::cout << s << '\n'; // "exemplary" std::string const c("Exemplary"); char const& f2 = c.front(); std::cout << &f2 << '\n'; // "Exemplary" ...
#include <iostream> #include <string_view> int main() { for (std::string_view str{"ABCDEF"}; !str.empty(); str.remove_prefix(1)) std::cout << str.front() << ' ' << str << '\n'; } 输出: A ABCDEF B BCDEF C CDEF D DEF E EF F F参阅...
std::basic_string_view<CharT,Traits>::frontC++ 字符串库 std::basic_string_view constexpr const_reference front() const; (C++17 起) 返回到视图首字符的引用。若 empty() == true 则行为未定义。 参数(无) 返回值到首字符的引用,等价于 operator[](0)。
#include <iostream> #include <string_view> int main() { for (std::string_view str{"ABCDEF"}; !str.empty(); str.remove_prefix(1)) std::cout << str.front() << ' ' << str << '\n'; } Output: A ABCDEF B BCDEF C CDEF D DEF E EF F FSee...
to_string(std::same_as<std::any> auto const&) -> std::string { return "std::any"; }2 regression-tests/test-results/clang-12/mixed-string-interpolation.cpp.execution @@ -14,4 +14,4 @@ p = (first, (empty)) t = (3.140000, (empty), (empty)) vv = 0 vv = (1, 2.300000)...
#include <iostream>#include <string>intmain(){{std::strings("Exemplary");char&f=s.front();f='e';std::cout<<s<<'\n';// "exemplary"}{std::stringconstc("Exemplary");charconst&f=c.front();std::cout<<&f<<'\n';// "Exemplary"}} ...
#include <iostream>#include <string>intmain(){{std::strings("Exemplary");char&f=s.front();f='e';std::cout<<s<<'\n';// "exemplary"}{std::stringconstc("Exemplary");charconst&f=c.front();std::cout<<&f<<'\n';// "Exemplary"}} ...
std::experimental::basic_string_view<CharT,Traits>::front From cppreference.com< cpp | experimental | basic string viewC++ Compiler support Freestanding and hosted Language Standard library Standard library headers Named requirements Feature test macros (C++20) Language support library...