【STL】标准库中vector的构造函数

#include <iostream>#include <cstring> #include <vector>int ar[10] = {11, 12, 13, 14, 15, 16, 17, 18, 19, 20};char* str = "Hello World";int main(void){// 构造函数（向量大小，向量初始值）std::vector<int> vec1(4, 25);// 构造函数（复制构造函数）std::vector<int> vec2(vec1);// 构造函数（数组的）std::vector<int> vec3(ar+1, ar+9);std::vector<char> vec4(str, str + strlen(str));std::vector<int> vec5(vec3.begin()+2, vec3.begin()+5);// vec1for (std::vector<int>::const_iterator p=vec1.begin(); p!=vec1.end(); ++p){std::cout << *p << " ";}std::cout << std::endl;// vec2for (std::vector<int>::const_iterator p=vec2.begin(); p!=vec2.end(); ++p){std::cout << *p << " ";}std::cout << std::endl;// vec3for (std::vector<int>::const_iterator p=vec3.begin(); p!=vec3.end(); ++p){std::cout << *p << " ";}std::cout << std::endl;// vec4for (std::vector<char>::const_iterator p=vec4.begin(); p!=vec4.end(); ++p){std::cout << *p;}std::cout << std::endl;// vec5for (std::vector<int>::const_iterator p=vec5.begin(); p!=vec5.end(); ++p){std::cout << *p << " ";}std::cout << std::endl;return 0;}