char或wchar_t char16_t或char32_t (C++11 起) char8_t (C++20 起) 浮点数字面量是float、double或longdouble类型的值 字符串字面量是有下列类型之一的字符序列: constchar[]或constwchar_t[] constchar16_t[]或constchar32_t[] (C++11 起) ...
boolb="bar"==3+"foobar";// 可以是 true 或 false,未指定constchar*pc="Hello";char*p=const_cast<char*>(pc);p[0]='M';// 行为未定义 原始字符串字面量 原始字符串字面量是前缀包含R的字符串字面量(语法(2,4,6,8,10))。这种字面量不会转义任何字符,也就是说分隔序列d字符序列 (和...
basic_string−char_traits basic_string_view(C++17) Text processing library Primitive numeric conversions(C++17) Formatting(C++20)−Localization text_encoding(C++26) Regular expressions(C++11) basic_regex−Algorithms Default regular expression grammar ...
(9,10)UTF-32 string literalconstchar32_t[N]UTF-32 In the types listed in the table above,Nis the number of encoded code units, which is determinedbelow. Ordinaryand UTF-8(since C++11)string literals are collectively referred to as narrow string literals. ...
#include <inttypes.h> #include <stdint.h> #include <stdio.h> int main(void) { const char* s = "Hello"; printf("Strings:\n"); // same as puts("Strings"); printf(" padding:\n"); printf("\t[%10s]\n", s); printf("\t[%-10s]\n", s); printf("\t[%*s]\n", 10, ...
{union{inta;constchar*p; }; a=1; p="Jennifer"; } union-like class #include<iostream>//S has one non-static data member (tag), three enumerator members,//and three variant members (c, n, d)structS {enum{CHAR, INT, DOUBLE} tag;union{charc;intn;doubled; ...
basic_string−char_traits basic_string_view(C++17) Text processing library Primitive numeric conversions(C++17) Formatting(C++20)−Localization text_encoding(C++26) Regular expressions(C++11) basic_regex−Algorithms Default regular expression grammar ...
语句.一个属于const对象的mutable 成员可以被修改. namespace name { declaration-list; } 关键字namespace允许你创建一个新的空间.名字由你选择,忽略创建没有命名的名字空间.一旦你创建了一个名字空间,你必须明确地说明它或者用关键字using. 例如: new
#include "stdio.h" #include "stdlib.h" #include "string.h" int add_int(int lhs, int rhs) { return lhs + rhs; } void add_str(const char *lhs, int lhs_size, const char *rhs, int rhs_size, char *res, int *res_size) { memcpy(res, lhs, lhs_size); memcpy(res + lhs_size...
propagate_const − ostream_joiner − randint observer_ptr − Detection idiom Standard library extensions v3 (library fundamentals TS v3) scope_exit − scope_fail − scope_success − unique_resource Parallelism library extensions v2(parallelism TS v2) simd Concurrency library extensions...