vector基本

#include
#include <string>
#include int main()
{std::vector<int> v1(10) ; //10个int数据&＃xff0c;每个都为0std::vector<int> v2(10,100);//10个int数据&＃xff0c;每个为100std::vector<int> v3{1,2,3,4,5};//5个int数据&＃xff0c;分别为1&＃xff0c;2,3,4,5
std::vectorstring> v4{"C&＃43;&＃43;"};std::vectorstring> v5{10};std::vectorstring> v6{10,"C&＃43;&＃43;"};std::vectorstring> v7(10);std::vectorstring> v8(10,"C&＃43;&＃43;");std::vectorstring> v9{"C&＃43;&＃43;","是","人类的好朋友"};std::cout<<"--------------------------------------"<<std::endl;for(auto i : v1)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v2)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v3)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v4)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v5)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v6)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v7)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v8)std::cout<" ";std::cout<<std::endl;std::cout<<"--------------------------------------"<<std::endl;for(auto i : v9)std::cout<" ";std::cout<<std::endl;return 0;
}

#include
#include <string>
#include int main()
{std::vector<int> i ;i[0] &＃61; 10 ; //错误return 0;
}

#include
#include <string>
#include int main()
{std::vector<int> i(10) ;i[100] &＃61; 100 ; //错误
std::cout<100]<<std::endl;return 0;
}

#include
#include <string>
#include int main()
{std::vector<int> i;for(decltype(i.size()) index&＃61;0;index<&＃61;100;&＃43;&＃43;index){i.push_back(index) ;}for(auto& re : i){re *&＃61; re ;std::cout<std::endl ;}
}

#include
#include <string>
#include int main()
{std::vector num(11,0) ;//11个元素&＃xff0c;每个为0
unsigned grade &＃61; 0 ;while(std::cin>>grade)if(grade<&＃61;100)&＃43;&＃43;num[grade/10] ;for(auto i : num)std::cout<" ";std::cout<<std::endl;
}