C++ \u4f5c\u4e3a\u4e00\u95e8\u517c\u5177\u9ad8\u6027\u80fd\u4e0e\u5e95\u5c42\u63a7\u5236\u80fd\u529b\u7684\u8bed\u8a00，\u5728\u6570\u5341\u5e74\u7684\u6f14\u8fdb\u4e2d\u4e0d\u65ad\u5438\u6536\u73b0\u4ee3\u7f16\u7a0b\u601d\u60f3\u3002\u4ece C++11 \u5f00\u59cb，\u8bed\u8a00\u8fdb\u5165\u4e86\u4e00\u4e2a\u5feb\u901f\u8fed\u4ee3\u7684\u9636\u6bb5，C++14\u3001C++17 \u4e0e C++20 \u76f8\u7ee7\u63a8\u51fa，\u4e3a\u5f00\u53d1\u8005\u5e26\u6765\u4e86\u5927\u91cf\u63d0\u5347\u751f\u4ea7\u529b\u4e0e\u4ee3\u7801\u53ef\u8bfb\u6027\u7684\u65b0\u7279\u6027\u3002\u672c\u6587\u5c06\u4ece C++11 \u51fa\u53d1，\u7cfb\u7edf\u68b3\u7406\u5404\u7248\u672c\u7684\u6838\u5fc3\u73b0\u4ee3\u7279\u6027，\u5e76\u901a\u8fc7\u53ef\u8fd0\u884c\u7684\u793a\u4f8b\u5e2e\u52a9\u8bfb\u8005\u5feb\u901f\u638c\u63e1\u3002<\/p>\n
C++11 \u662f C++ \u53d1\u5c55\u53f2\u4e0a\u7684\u91cc\u7a0b\u7891，\u5b83\u5f15\u5165\u4e86\u5927\u91cf\u5f71\u54cd\u6df1\u8fdc\u7684\u7279\u6027，\u5960\u5b9a\u4e86\u73b0\u4ee3 C++ \u7684\u7f16\u7a0b\u98ce\u683c\u3002<\/p>\n
auto \u5173\u952e\u5b57\u8ba9\u7f16\u8bd1\u5668\u6839\u636e\u521d\u59cb\u5316\u8868\u8fbe\u5f0f\u81ea\u52a8\u63a8\u5bfc\u53d8\u91cf\u7c7b\u578b，\u663e\u8457\u51cf\u5c11\u4e86\u5197\u957f\u7684\u7c7b\u578b\u4e66\u5199\u3002\u8303\u56f4 for \u5faa\u73af\u5219\u8ba9\u904d\u5386\u5bb9\u5668\u53d8\u5f97\u66f4\u52a0\u7b80\u6d01\u76f4\u89c2\u3002<\/p>\n
#include <iostream>
\n#include <vector><\/p>\n
int main() {
\n std::vector<int> nums = {1, 2, 3, 4, 5};
\n for (auto n : nums) {
\n std::cout << n << " ";
\n }
\n return 0;
\n}<\/p>\n
unique_ptr\u3001shared_ptr \u4e0e weak_ptr \u7684\u5f15\u5165，\u8ba9\u8d44\u6e90\u7ba1\u7406\u4ece\u624b\u52a8 new\/delete \u8f6c\u5411\u4e86\u57fa\u4e8e RAII \u7684\u81ea\u52a8\u7ba1\u7406，\u5927\u5e45\u964d\u4f4e\u4e86\u5185\u5b58\u6cc4\u6f0f\u7684\u98ce\u9669\u3002<\/p>\n
#include <memory><\/p>\n
struct Widget {
\n int value;
\n};<\/p>\n
int main() {
\n auto ptr = std::make_unique<Widget>();
\n ptr->value = 42;
\n return 0;
\n}<\/p>\n
Lambda \u8868\u8fbe\u5f0f\u5141\u8bb8\u5728\u51fd\u6570\u5185\u90e8\u76f4\u63a5\u5b9a\u4e49\u533f\u540d\u51fd\u6570\u5bf9\u8c61，\u914d\u5408\u6807\u51c6\u5e93\u7b97\u6cd5\u4f7f\u7528\u65f6\u6781\u4e3a\u65b9\u4fbf\u3002<\/p>\n
#include <algorithm>
\n#include <vector><\/p>\n
int main() {
\n std::vector<int> v = {3, 1, 4, 1, 5};
\n std::sort(v.begin(), v.end(), [](int a, int b) {
\n return a < b;
\n });
\n return 0;
\n}<\/p>\n
\u53f3\u503c\u5f15\u7528 && \u4e0e\u79fb\u52a8\u6784\u9020\u51fd\u6570\u3001\u79fb\u52a8\u8d4b\u503c\u8fd0\u7b97\u7b26\u7684\u5f15\u5165，\u4f7f\u5f97\u4e34\u65f6\u5bf9\u8c61\u7684\u8d44\u6e90\u53ef\u4ee5\u88ab\u9ad8\u6548\u8f6c\u79fb，\u907f\u514d\u4e86\u4e0d\u5fc5\u8981\u7684\u6df1\u62f7\u8d1d，\u663e\u8457\u63d0\u5347\u4e86\u5bb9\u5668\u4e0e\u5b57\u7b26\u4e32\u7b49\u7c7b\u578b\u7684\u6027\u80fd\u3002<\/p>\n
C++14 \u5728 C++11 \u7684\u57fa\u7840\u4e0a\u505a\u4e86\u7a33\u5065\u7684\u8865\u5145，\u6ca1\u6709\u5f15\u5165\u98a0\u8986\u6027\u53d8\u5316，\u4f46\u8ba9\u8bb8\u591a\u7279\u6027\u66f4\u52a0\u6613\u7528\u3002<\/p>\n
C++14 \u5141\u8bb8 Lambda \u53c2\u6570\u4f7f\u7528 auto，\u4ece\u800c\u5199\u51fa\u9002\u7528\u4e8e\u4efb\u610f\u7c7b\u578b\u7684\u6cdb\u578b Lambda\u3002<\/p>\n
auto add = [](auto a, auto b) { return a + b; };
\nint x = add(1, 2); \/\/ int
\ndouble y = add(1.5, 2.5); \/\/ double<\/p>\n
\u666e\u901a\u51fd\u6570\u53ef\u4ee5\u4f7f\u7528 auto \u4f5c\u4e3a\u8fd4\u56de\u7c7b\u578b，\u7531\u7f16\u8bd1\u5668\u63a8\u5bfc\u5b9e\u9645\u8fd4\u56de\u7c7b\u578b\u3002<\/p>\n
auto multiply(int a, int b) {
\n return a * b;
\n}<\/p>\n
\u53d8\u91cf\u6a21\u677f\u5141\u8bb8\u5b9a\u4e49\u4e00\u7ec4\u4e0e\u7c7b\u578b\u76f8\u5173\u7684\u5e38\u91cf，\u4f8b\u5982\u6570\u5b66\u5e38\u91cf\u3002<\/p>\n
template<typename T>
\nconstexpr T pi = T(3.1415926535897932385);<\/p>\n
double area = pi<double> * r * r;<\/p>\n
C++17 \u8fdb\u4e00\u6b65\u7b80\u5316\u4e86\u65e5\u5e38\u7f16\u7801，\u540c\u65f6\u589e\u5f3a\u4e86\u6807\u51c6\u5e93\u7684\u80fd\u529b\u3002<\/p>\n
\u7ed3\u6784\u5316\u7ed1\u5b9a\u5141\u8bb8\u5c06\u7ed3\u6784\u4f53\u3001\u5143\u7ec4\u6216\u5bb9\u5668\u7684\u5143\u7d20\u76f4\u63a5\u89e3\u5305\u5230\u591a\u4e2a\u53d8\u91cf\u4e2d\u3002<\/p>\n
#include <map>
\n#include <string><\/p>\n
int main() {
\n std::map<std::string, int> scores = {{"Alice", 90}, {"Bob", 85}};
\n for (const auto& [name, score] : scores) {
\n \/\/ \u76f4\u63a5\u4f7f\u7528 name \u548c score
\n }
\n return 0;
\n}<\/p>\n
\u5728 if \u6216 switch \u7684\u6761\u4ef6\u4e2d\u76f4\u63a5\u58f0\u660e\u53d8\u91cf，\u4f5c\u7528\u57df\u88ab\u9650\u5236\u5728\u8bed\u53e5\u5757\u5185\u3002<\/p>\n
if (auto it = map.find("key"); it != map.end()) {
\n \/\/ \u4f7f\u7528 it
\n}<\/p>\n
std::optional \u8868\u793a\u53ef\u80fd\u4e0d\u5b58\u5728\u7684\u503c，std::variant \u5219\u662f\u4e00\u79cd\u7c7b\u578b\u5b89\u5168\u7684\u8054\u5408\u4f53\u3002<\/p>\n
#include <optional><\/p>\n
std::optional<int> parse(const std::string& s) {
\n if (s.empty()) return std::nullopt;
\n return std::stoi(s);
\n}<\/p>\n
C++20 \u88ab\u8a89\u4e3a\u4e00\u6b21\u5212\u65f6\u4ee3\u7684\u66f4\u65b0，\u5f15\u5165\u4e86\u6982\u5ff5\u3001\u534f\u7a0b\u3001\u8303\u56f4\u7b49\u91cd\u91cf\u7ea7\u7279\u6027\u3002<\/p>\n
\u6982\u5ff5\u5141\u8bb8\u5728\u7f16\u8bd1\u671f\u5bf9\u6a21\u677f\u53c2\u6570\u8fdb\u884c\u7ea6\u675f，\u663e\u8457\u6539\u5584\u4e86\u6a21\u677f\u7684\u62a5\u9519\u4fe1\u606f\u4e0e\u53ef\u8bfb\u6027\u3002<\/p>\n
#include <concepts><\/p>\n
template<typename T>
\nrequires std::integral<T>
\nT add(T a, T b) {
\n return a + b;
\n}<\/p>\n
int main() {
\n int x = add(1, 2); \/\/ \u5408\u6cd5
\n \/\/ double y = add(1.5, 2.5); \/\/ \u7f16\u8bd1\u9519\u8bef
\n return 0;
\n}<\/p>\n
\u534f\u7a0b\u8ba9\u5f02\u6b65\u7f16\u7a0b\u548c\u60f0\u6027\u751f\u6210\u5668\u53d8\u5f97\u81ea\u7136，\u51fd\u6570\u53ef\u4ee5\u901a\u8fc7 co_await\u3001co_yield \u7b49\u5173\u952e\u5b57\u6302\u8d77\u4e0e\u6062\u590d\u3002<\/p>\n
#include <coroutine>
\n#include <iostream><\/p>\n
struct Generator {
\n struct promise_type {
\n int current_value;
\n Generator get_return_object() { return Generator{this}; }
\n std::suspend_always initial_suspend() { return {}; }
\n std::suspend_always final_suspend() noexcept { return {}; }
\n std::suspend_always yield_value(int v) {
\n current_value = v;
\n return {};
\n }
\n void return_void() {}
\n void unhandled_exception() {}
\n };
\n promise_type* p;
\n bool next() { return p->current_value != -1; }
\n int value() { return p->current_value; }
\n};<\/p>\n
Generator range(int n) {
\n for (int i = 0; i < n; ++i) co_yield i;
\n}<\/p>\n
\u8303\u56f4\u5e93\u63d0\u4f9b\u4e86\u4e00\u5957\u7ec4\u5408\u5f0f\u3001\u60f0\u6027\u6c42\u503c\u7684\u7b97\u6cd5\u89c6\u56fe，\u8ba9\u6570\u636e\u5904\u7406\u6d41\u6c34\u7ebf\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n
#include <ranges>
\n#include <vector>
\n#include <iostream><\/p>\n
int main() {
\n std::vector<int> v = {1, 2, 3, 4, 5, 6};
\n auto even = v | std::views::filter([](int n) { return n % 2 == 0; })
\n | std::views::transform([](int n) { return n * n; });
\n for (int n : even) {
\n std::cout << n << " ";
\n }
\n return 0;
\n}<\/p>\n
| auto \u7c7b\u578b\u63a8\u5bfc<\/td>\n | \u652f\u6301<\/td>\n | \u589e\u5f3a<\/td>\n | \u589e\u5f3a<\/td>\n | \u589e\u5f3a<\/td>\n<\/tr>\n |
| Lambda \u8868\u8fbe\u5f0f<\/td>\n | \u5f15\u5165<\/td>\n | \u6cdb\u578b Lambda<\/td>\n | \u589e\u5f3a<\/td>\n | \u6a21\u677f Lambda<\/td>\n<\/tr>\n |
| \u667a\u80fd\u6307\u9488<\/td>\n | \u5f15\u5165<\/td>\n | \u5b8c\u5584<\/td>\n | \u5b8c\u5584<\/td>\n | \u5b8c\u5584<\/td>\n<\/tr>\n |
| \u7ed3\u6784\u5316\u7ed1\u5b9a<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u5f15\u5165<\/td>\n | \u589e\u5f3a<\/td>\n<\/tr>\n |
| \u6982\u5ff5<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u5f15\u5165<\/td>\n<\/tr>\n |
| \u534f\u7a0b<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u5f15\u5165<\/td>\n<\/tr>\n |
| \u8303\u56f4\u5e93<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u4e0d\u652f\u6301<\/td>\n | \u5f15\u5165<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n7. \u5b9e\u8df5\u5efa\u8bae<\/h3>\nhttps:\/\/tv.sohu.com\/v\/dXMvNDQ1Njg4NzExLzc0MjYxNTg5Ni5zaHRtbA==.html \u9762\u5bf9\u5982\u6b64\u4e30\u5bcc\u7684\u7279\u6027，\u5f00\u53d1\u8005\u5e94\u6839\u636e\u9879\u76ee\u5b9e\u9645\u60c5\u51b5\u5faa\u5e8f\u6e10\u8fdb\u5730\u91c7\u7528\u3002\u5efa\u8bae\u4ece C++11 \u7684\u6838\u5fc3\u7279\u6027\u5165\u624b，\u9010\u6b65\u8fc7\u6e21\u5230 C++17 \u7684\u7ed3\u6784\u5316\u7ed1\u5b9a\u4e0e std::optional，\u518d\u5728\u5408\u9002\u7684\u573a\u666f\u4e2d\u5c1d\u8bd5 C++20 \u7684\u6982\u5ff5\u4e0e\u8303\u56f4\u3002\u540c\u65f6，\u4fdd\u6301\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u4e0e\u53ef\u7ef4\u62a4\u6027\u59cb\u7ec8\u662f\u7b2c\u4e00\u539f\u5219，\u65b0\u7279\u6027\u7684\u5f15\u5165\u5e94\u5f53\u670d\u52a1\u4e8e\u4ee3\u7801\u8d28\u91cf\u7684\u63d0\u5347，\u800c\u975e\u5355\u7eaf\u8ffd\u6c42\u65b0\u6f6e\u3002<\/p>\n 8. \u603b\u7ed3<\/h3>\n\u4ece C++11 \u5230 C++20，C++ \u8bed\u8a00\u5728\u4fdd\u6301\u9ad8\u6027\u80fd\u7684\u540c\u65f6，\u4e0d\u65ad\u5438\u6536\u73b0\u4ee3\u7f16\u7a0b\u8bed\u8a00\u7684\u4f18\u70b9，\u8ba9\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3001\u5b89\u5168\u4e14\u5bcc\u6709\u8868\u73b0\u529b\u3002\u638c\u63e1\u8fd9\u4e9b\u73b0\u4ee3\u7279\u6027，\u4e0d\u4ec5\u80fd\u591f\u63d0\u5347\u5f00\u53d1\u6548\u7387，\u4e5f\u80fd\u5e2e\u52a9\u5f00\u53d1\u8005\u5199\u51fa\u66f4\u5065\u58ee\u3001\u66f4\u6613\u7ef4\u62a4\u7684\u4ee3\u7801\u3002\u5e0c\u671b\u672c\u6587\u7684\u68b3\u7406\u80fd\u4e3a\u4f60\u7684 C++ \u5b66\u4e60\u4e0e\u5b9e\u8df5\u5e26\u6765\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" 1. \u5f15\u8a00C \u4f5c\u4e3a\u4e00\u95e8\u517c\u5177\u9ad8\u6027\u80fd\u4e0e\u5e95\u5c42\u63a7\u5236\u80fd\u529b\u7684\u8bed\u8a00，\u5728\u6570\u5341\u5e74\u7684\u6f14\u8fdb\u4e2d\u4e0d\u65ad\u5438\u6536\u73b0\u4ee3\u7f16\u7a0b\u601d\u60f3\u3002\u4ece C11 \u5f00\u59cb，\u8bed\u8a00\u8fdb\u5165\u4e86\u4e00\u4e2a\u5feb\u901f\u8fed\u4ee3\u7684\u9636\u6bb5，C14\u3001C17 \u4e0e C20 \u76f8\u7ee7\u63a8\u51fa，\u4e3a\u5f00\u53d1\u8005\u5e26\u6765\u4e86\u5927\u91cf\u63d0\u5347\u751f\u4ea7\u529b\u4e0e\u4ee3\u7801\u53ef\u8bfb\u6027\u7684\u65b0\u7279\u6027\u3002\u672c\u6587\u5c06\u4ece C11 \u51fa\u53d1，\u7cfb\u7edf\u68b3\u7406\u5404\u7248\u672c\u7684\u6838\u5fc3\u73b0\u4ee3\u7279\u6027，\u5e76\u901a\u8fc7\u53ef\u8fd0\u884c\u7684\u793a\u4f8b\u5e2e\u52a9\u8bfb\u8005\u5feb\u901f\u638c\u63e1\u30022. C11：\u73b0\u4ee3 C \u7684\u8d77\u70b9C11 \u662f C \u53d1\u5c55\u53f2\u4e0a\u7684\u91cc\u7a0b\u7891&<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,2962,190],"topic":[],"class_list":["post-101107","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-c20","tag-190"],"yoast_head":"\n |