Question

How to get the first element of set in C++

Answer 1

#include <iostream>
#include <set>
   
int main()
{
    std::set<int> st = {12, 100, 89, 55, 45, 99, 19, 61, 70};
   
    std::set<int> :: iterator it = st.begin();

    std::cout << *it;
}
   
   
   
   
/*
run:
   
12
   
*/

 

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Answer 2

#include <iostream>
#include <set>
   
int main()
{
    std::set<int> st = {12, 100, 89, 55, 45, 99, 19, 61, 70};
   
    auto firstElement = *(st.begin()); 

    std::cout << firstElement;
}
   
   
   
   
/*
run:
   
12
   
*/

 

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Answer 3

#include <iostream>
#include <set>
   
int main()
{
    std::set<int> st = {19, 12, 100, 89, 55, 45, 99, 19, 61, 70};
   
    auto firstElement = st.begin();

    std::cout << *firstElement;
}
   
   
   
   
/*
run:
   
19
   
*/

 

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