intmain() { vector<int>a(10); for(inti=0;i<a.size();i++) cout<<a[i]<<" "; return0; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 结果:(感觉默认生成为0) (2)vector<int>a(10,1);//定义了10个整型元素的向量,且给出每个元素的初值为1 1. 测试 #include<iostre...
// vector_bool_ref_flip.cpp// compile with: /EHsc /W4#include<vector>#include<iostream>intmain(){usingnamespacestd;cout<< boolalpha;vector<bool> vb = {true,false,false,true,true};cout<<"The vector is: "<<endl<<" ";for(constauto& b : vb) {cout<< b <<" "; }cout<<endl;vec...
CREATE TABLE embeddings (model_id bigint, item_id bigint, embedding vector, PRIMARY KEY (model_id, item_id));However, you can only create indexes on rows with the same number of dimensions (using expression and partial indexing):CREATE INDEX ON embeddings USING hnsw ((embedding::vector(3)...
// vector_bool_ref_op_assign.cpp// compile with: /EHsc#include<vector>#include<iostream>#include<string>usingnamespacestd;template<typenameC>voidprint(conststring& s,constC& c){cout<< s;for(constauto& e : c) {cout<< e <<" "; }cout<<endl; }intmain(){cout<< boolalpha;vector<boo...
二维数组只在初始化时有所区别,需要指明行列的值 1vector<vector<int>>res(row,vector<int>(col,0));//初始化row*col数组,初始元素都为023vector<vector<int>>res(row,vector<int>(col));//初始化row*col数组45vector<vector<int>>res;6res.size(r);7for(...
shrink_to_fit,去掉预留的空间,capacity与size保持一致 代码语言:javascript 复制 #include<iostream>#include<vector>using namespace std;intmain(){vector<int>vec0;cout<<"vec0 empty status:"<<vec0.empty()<<endl;// 1for(int i=0;i<10;++i){vec0.push_back(i);//[0,1,2,3,4,5,6,7,8...
//从数组中获得初值intb[7]={1,2,3,4,5,6,7};vector<int>a(b,b+7); 1.3 vector对象的常用内置函数使用(举例说明) #include<vector>vector<int>a,b;//b为向量,将b的0-2个元素赋值给向量aa.assign(b.begin(),b.begin()+3);//a含有4个值为2的元素a.assign(4,2);//返回a的最后一个元素...
inta[]={1,2,3};inta2[]=a;//错误a2=a;//错误 2、访问数组元素 数组的索引是从0开始,如:包含10个元素的数组a,其索引是从0到9而非1到10,若是a[10]则下标越界。 另外,使用数组下标时,其类型是size_t,在头文件cstddef中。 二、向量vector ...
(writer,"src:\t{0}",src);// It can not only format the string, but also display the hexadecimal of each element in the vector on the right Easy to view vector data .// ShiftLeft. It is a new vector method in `.NET 7.0`constintshiftAmount=1;Vector<short>shifted=Vectors.ShiftLeft(...
size() << endl; // 输出:0 6.2.3 相关链接 C++ vector::erase() 文档 6.3 修改元素 通过迭代器或下标可以直接修改 vector 中的元素。 6.3.1 示例:修改 vector 元素 代码语言:javascript 复制 #include <iostream> #include <vector> using namespace std; int main() { vector<int> v = {1, 2, ...