vector和list就是两种不同类型的sequential container。两种类型是指:一个为连续内存空间,一个为非连续内存,通过指针串联的顺序性容器。set和map为associative container,他们是key—value形式形成的关联性容器。 不管何种容器里存放的是何种元素,int也好,string也好,STL中的算法都可以作用在他们身上,实现技术则是function ...
int main() {std::vector<std::string> myvector;myvector.push_back("wo");myvector.push_back("wi");myvector.push_back("wa");myvector.push_back("ao");myvector.push_back("bo");myvector.push_back("ae");myvector.push_back("bv");myvector.push_back("cd");myvector.push_back("ef"...
其中需要注意的是,op必须是派生自binay_function: structcompare: binary_function<A,string,bool>{booloperator()( A &a,stringstr)const{if(a.s== str)//假设a结构体存在string变量sreturntrue;elsereturnfalse; } }; vector<good> ::iterator f = find_if(goods[ty].begin(),goods[ty].end(),bind...
用stl的find方法查找一个包含简单类型的vector中的元素是很简单的,例如 vector<string> strVec; find(strVec.begin(),strVec.end(),”aa”); 1. 假如vector包含一个复合类型的对象呢比如 class A { public: A(const std::string str,int id) { this->str=str; this->id=id; } private: std::string ...
。STL是C++非常宝贵的一部分,提供了许多对C的优化。就像你这里说的vector和指针。vector就安全得多,并且提供了很多方便的操作;使用vector不仅你会出错更少,并且很多烦琐的代码你都不用编写,它都是vector自带的。另外,站长团上有产品团购,便宜有保证 class...
定义一个二元函数,利用ptr_fun函数配接器,将函数指针转换为仿函数。如下: boolcomp(good & g,intc) {if( ==c)returntrue;elsereturnfalse; } vector<good> ::iterator f = find_if(goods[ty].begin(),goods[ty].end(),bind2nd(ptr_fun(comp),com)); 1. 2. 3. 4. 5. 6. 7. 8....
error: no matching function for call to ‘find(std::vector::reverse_iterator, std::vector::reverse_iterator, int)’ 45 | RevIter ri = find(v1.rbegin(), v1.rend(), 3); 原因:使用find函数,需要包含algorithm的头文件。 解决方法:在文件里加上#include<algorithm>即可。
cout<<c<<" ";// Printing the original elements of the vectorvector<string>result=test(colors);// Calling the test function to find strings containing digitscout<<"\n\nFind strings that contain a number(s) from the said vector:\n";for(string c:result)cout<<c<<" ";// Printing the...
【题目】Find a vector function that represents th e curv e of intersection of th e cylinder$$ x ^ { 2 } + y ^ { 2 } = 1 $$and th e plane$$ y + z = 2 $$ 相关知识点: 试题来源: 解析 【解析】 Fiqure 5 shows how the plane and the culinde r intersect, and Fiqure 6 ...
Input signal, specified as a real-valued vector or matrix. If x is a vector with N elements, then findchangepts partitions x into two regions, x(1:ipt-1) and x(ipt:N), that minimize the sum of the residual (squared) error of each region from the local value of the statistic speci...