c++#include <iostream>#include <vector>#include <string>using namespace std;int main(){ string str ="hello world"; vector<int> count(26,0); //创建一个长度为26的vector，初始值都为0 for (char c : str) //遍历字符串中的每个字符 { if (isalpha(c)) //判断是否...
vector<int> ivec2(10); //vector<T> v(n)形式,v包含n 个值初始化的元素 vector<string> svec(10); //数组初始化vector int iarray[]={1,2,3,4,5,6,7,8,9,0}; //count: iarray数组个数 size_t count=sizeof(iarray)/sizeof(int); //int数组初始化 ivec3 vector<int> ivec3(iarray...
intmain(){std::vector<A> str_list;std::vector<A> str_list2;std::vector<A> str_list3;std::vector<A> str_list4;intcount =100000;//提前留好空间,防止创建内存干扰str_list.reserve(count *2); str_list2.reserve(count *2); str_list3.reserve(count *2); str_list4.reserve(count *2)...
故这里写一个统一的打印接口voidprintVector(vector<int>&v){for(vector<int>::iteratorit=v.begin();it!=v.end();it++){cout<<*it<<" ";}cout<<endl;}voidtest_vector(){//1,默认构造,无参构造vector<int>v1;for(inti=0;i<10;i++){v1.push_back(i);}printVector(v1);//2,通过区间的...
Start(); for (int i = 0; i < size; i += Vector<float>.Count) { Vector<float> vectorA = new Vector<float>(arrayA, i); Vector<float> vectorB = new Vector<float>(arrayB, i); Vector<float> resultVector = Vector.Add(vectorA, vectorB); resultVector.CopyTo(result, i); } vector...
#include<iostream>#include<vector>using namespace std;intmain(){vector<int>v;//预先开辟空间v.reserve(100000);int*pStart=NULL;int count=0;for(int i=0;i<100000;i++){v.push_back(i);if(pStart!=&v[0]){pStart=&v[0];count++;}}cout<<"count:"<<count<<endl;system("pause");return...
vector<int> v1; //元素类型为intvector<char> v2; //元素类型为charvector<string> v3; //元素类型为stringvector<vector<int>> v4; //元素类型为vector<int> 向vector中添加元素; vector<int> v1;//使用push_back进行尾插v1.push_back(1);v1.push_back(2); ...
vector<int> v3(10, 100); printVector(v3); vector<int> v4(v3); printVector(v4); } int main() { test01(); return 0; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21.
(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(...
_Count:表示向量中包含的元素数量。 示例代码: #include <vector>#include <iostream>int main() {std::vector<int> vec(5); // Create a vector with 5 elements, all initialized to 0std::cout << "Size of vec: " << vec.size() << std::endl; // Output: 5std::cout << "Elements of...