Clicker Questions - 15-Set
Question 1: What is the output of p1.cpp when it runs with input-1.txt as standard input?
input-1.txt
Samuel
Amelia
Lucas
Ian
Cole
Brooke
Bailey
Lucas
Charlie
Samuel
p1.cpp
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#include <set>
#include <iostream>
using namespace std;
int main()
{
set <string> n;
set <string>::const_iterator nit;
string s;
while (cin >> s) n.insert(s);
for (nit = n.begin(); nit != n.end(); nit++) {
cout << nit->at(0) ;
}
cout << endl;
return 0;
}
Answer
Remember that you don't insert duplicate elements into a set.UNIX> g++ p1.cpp UNIX> ./a.out < input-1.txt ABBCCILS UNIX>
Question 2: What is the output of p2.cpp when it runs with input-2.txt as standard input?
input-2.txt
Gabriel
Wyatt
Eva
Lily
Sarah
Benjamin
Nicholas
Michael
Landon
Madelyn
p2.cpp
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#include <set>
#include <iostream>
using namespace std;
int main()
{
set <string> n;
set <string>::const_iterator nit;
string s;
while (cin >> s) n.insert(s);
for (nit = n.begin(); nit != n.end(); nit++) {
cout << nit->at(0) ;
nit++;
}
cout << endl;
return 0;
}
Answer
UNIX> g++ p2.cpp UNIX> ./a.out < input-2.txt BGLMS UNIX>
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