c++ vector
#include <vector>
int main() {
std::vector<int> v;
v.push_back(10); // v = [10];
v.push_back(20); // v = [10, 20];
v.pop_back(); // v = [10];
v.push_back(30); // v = [10, 30];
auto it = v.begin();
int x = *it; // x = 10;
++it;
int y = *it; // y = 30
++it;
bool is_end = it == v.end(); // is_end = true
return 0;
}c++ vector
#include <vector>
#include <string>
int main() {
std::vector<std::string> str_v;
str_v.push_back("abc");
str_v.push_back("hello world!!");
str_v.push_back("i'm a coder.");
for(auto it = str_v.beigin();it != str_v.end(); it++) {
printf("%s\n",it->c_str());
}
}std vector include c++
#include <vector>
std::vector<std::string> x;adding element in vector c++
vector_name.push_back(element_to_be_added);c++ vector size
#include <vector>
int main() {
std::vector<int> myVector = { 666, 1337, 420 };
size_t size = myVector.size(); // 3
myVector.push_back(399); // Add 399 to the end of the vector
size = myVector.size(); // 4
}declare vectors c++
vector<int> vec;
//Creates an empty (size 0) vector
vector<int> vec(4);
//Creates a vector with 4 elements.
/*Each element is initialised to zero.
If this were a vector of strings, each
string would be empty. */
vector<int> vec(4, 42);
/*Creates a vector with 4 elements.
Each element is initialised to 42. */
vector<int> vec(4, 42);
vector<int> vec2(vec);
/*The second line creates a new vector, copying each element from the
vec into vec2. */Copyright © 2021 Codeinu
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