C++STL使用例子--vector.docVIP

constructors 迭代器 #include iostream #include vector #include string #include algorithm using namespace std; int main() { string str[] = {Alex,John,Robert}; //empty vector object vectorint v1; //creates vector with 10 empty elements vectorint v2(10); //creates vector with 10 elements, //and assign value 0 for each; vectorint v3(10,0); //creates vector and assigns //values from string array vectorstring v4(str+0,str+3); vectorstring::iterator sIt = v4.begin(); while(sIt != v4.end()) cout *sIt++ ; cout endl; //copy constructor vectorstring v5(v4); for(int i = 0;i 3;i++) cout v5[i] ; cout endl; return 0; } ===================================== assign copy算法 #include iostream #include vector #include algorithm #include iterator using namespace std; int main() { int ary[] = {1,2,3,4,5}; vectorint v; //assin to the v the contains of ary v.assign(ary,ary+5); copy(v.begin(),v.end(),ostream_iteratorint(cout, )); coutendl; //replace v for 3 copies of 100 v.assign(3,100); copy(v.begin(),v.end(),ostream_iteratorint(cout, )); coutendl; return 0; } ===================================== at 返回下标为n的元素的引用 #include iostream #include vector using namespace std; int main() { vectorint v(3,0); v[0] = 100; v.at(1) = 200; for(int i = 0;i 3;i++) coutv.at(i) ; coutendl; return 0; } ====================================== back front 模板类 #include iostream #include vector #include string #include iterator using namespace std; templateclass T,class D class Member { public: Member(T t,D d): name(t),sal(d){} void print(); private: T name; D sal; }; templateclass T,class D void MemberT,D::print() { coutname salendl; } int main() { typedef Memberstring ,doubleM; vectorM v; v.push_back(M(Robert,60000)); v.push_back(M(Linda,75000)); vectorM::iterator It = v.begin(); coutEntire vector:endl; while(It != v.end()) (It++)-print(); coutendl; coutReturn from back()endl; v.back().print(); v.front().print(); return 0; } ===