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feat: menambahkan variant iterator #30

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Merged
yusuf601 merged 1 commit into from
Sep 11, 2025
Merged

feat: menambahkan variant iterator #30

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53 changes: 53 additions & 0 deletions iterator/variant_iterator.cpp
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Original file line number Diff line number Diff line change
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#include <iostream>
#include <iterator>
#include <vector>
#include <forward_list>
#include <list>
void _input_iterator(){ // dipakai untuk input
std::cout << "masukkan 3 angka: ";
std::istream_iterator<int> input_it(std::cin); //baca dari cin
std::istream_iterator<int>end; //penanda akhir

std::vector<int>data;
while(input_it != end && data.size() < 3){
data.push_back(*input_it); //push back deferencing iterator
++input_it;
}
std::cout << "data yang dibaca" << std::endl;
for(auto x: data){
std::cout << x << " ";
}
}
void _output_iterator(){ //dipakai untuk menulis data
std::vector<int>numbers {1,2,3,4,5};
std::ostream_iterator<int> output_it(std::cout," ");
for(auto x: numbers){
*output_it = x;
}
}
void _forward_iterator(){ //bisa maju berkali2 namun tidak bisa mundur
//singly linked list container
std::forward_list<int> fl = {1,2,3,4,5};
std::forward_list<int>::iterator it = fl.begin();
while(it != fl.end()){
std::cout << *it << std::endl;
}
//output 1 2 3 4 5
}
void _bidirectional_iterator(){ //bisa maju bisa mundur
std::list<int>ls = {1,2,3,4,5};
std::list<int>::iterator it = ls.begin();
++it; //it menunjuk alamat memory 20 skrg
std::cout << "ini it: " << *it << std::endl;
--it; //it menunjuk alamat memory 1 sekarang
std::cout << "ini it: " << *it << std::endl;
}
void _random_acces_iterator(){ //bisa maju mundur dan lompat
std::vector<int>v = {1,2,3,4,5};
std::vector<int>::iterator it = v.begin();
std::cout << *(it + 3); //output adlah 4
}
int main(){
_bidirectional_iterator();
return 0;
}
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