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What will be the output of the following C++ code?
#include <iostream> 
#include <vector> 
#include <forward_list>  
 
using namespace std; 
 
int main() 
{ 
    forward_list<int> fl1 = {1,2,3,4,5};
    for (int&c : fl1)  
        cout << c << " ";
    cout<<endl;
    fl1.remove_if([](int x){ return x > 3;});
    for (int&c : fl1)  
        cout << c << " ";
    cout<<endl;
    return 0; 
}

A. 1 2 3 4 5
1 2 3 4 5

B. 1 2 3 4 5
1 2

C. 1 2 3 4 5
1 2 3

D. 4 5
1 2 3 4 5

Answer: Option C


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What is the difference between '++i' and 'i++' in C++?

A. None of the above

B. They both have the same effect

C. '++i' increments the value of 'i' before returning it, while 'i++' increments the value of 'i' after returning it

D. '++i' increments the value of 'i' after returning it, while 'i++' increments the value of 'i' before returning it