使用std::pair返回两个值: C++标准库提供了std::pair,它可以用来方便地返回两个值。 cpp #include <iostream> #include <utility> std::pair<int, std::string> getPair() { return std::make_pair(42, "hello, world!"); } int main() { auto [intValue, strValue] = ge...
make_pair_return_pair jdtang 软件设计师// g++ -std=c++11 test.cpp && ./a.exe // lambda , iostream , adapt // cl test.cpp /EHsc & test.exe #include <iostream> #include <vector> #include <algorithm> #include <iterator> #include <string> #include<deque> #include <queue> #include...
参考代码 #include<bits/stdc++.h>usingnamespacestd; /*做法很简单:按照题目中的指示,判断每个条件是否成立即可判断条件二和条件四可以使用 for 循环*/ intn;strings;// string 相对于 char 数组 (char[])更方便 intmain{cin>> n;cin>> s; // 条件一:长度为奇数if(n%2==0) {puts("No");return0...
template <typename T> std::auto_ptr<T> clone(T const* t) { return t->clone(); } - Matt Cruikshank 4 像这样。为了使其看起来像标准库中的元素,建议将其名称更改为make_clone()(类似于make_pair<>)。 - Martin York 1 额外提示:让它成为一个友好的对象,并将成员函数clone()设为私有。 - M...
Example of std::pair #include <bits/stdc++.h>usingnamespacestd;intmain() {//define a pairpair<int, string>student;//create the pairstudent=make_pair(1,"XYZ");//extract memebers//.first extracts first memebercout<<"Roll: "<<student.first<<endl;//.second extracts second memebercout<<...
autodoSomething(){// calculationsreturnstd::make_pair(error_code, value) }intmain() {autoresult =doSomething();if(!result.first) { std::cout << result.second; }else{ std::cout <<"Something went wrong: "<< result.second; }
哈希直接上map #include<iostream>#include<cstdio>#include<cstring>#include<algorithm>#include<vector>#include<string>#include<set>#includeusingnamespacestd;typedeflonglongll;#definepii pair<int, ll>#defineMP make_pair#definefir first#definesec secondconstintN=1e5+5;intread(){charc=getchar();...
{returnstd::make_unique<Session>(method, url, dnsServer, flag); }voidadd(Session& s) { s.start();check(curl_multi_add_handle(curlm_, s.handle()),"curl_multi_add_handle"); }voidremove(Session& s) {check(curl_multi_remove_handle(curlm_, s.handle()),"curl_multi_remove_handle")...
using namespace std; constintmaxn=2e5+100; intc[maxn]; vector<int> g[maxn]; set<string> f[maxn]; intL[maxn],R[maxn],id[maxn]; intdep[maxn]; intsize[maxn]; inttot; intson[maxn]; intn,m; intans[maxn]; vector<pair<int,int> >q[maxn]; ...
OptPair<int, int> someFunction() { ... return OptPair<int, int>(false); } You have to make sure to check the result before using it, like this: void doStuffWithPair(std::pair<int, int>); void doStuffWithEmpty(); ... OptPair<int, int> ret = someFunction(); if (ret.contai...