Which is optional in the declaration of vector?
Pick out the correct statement about vector.
a) vector<int> values (5)
b) vector values (5)
c) vector<int> (5)
d) None of the mentioned
What is the output of this program?
1.
#include
2.
#include
3.
using namespace std;
4.
int main ()
5.
{
6.
vector myvector (5);
7.
int* p = myvector.data();
8.
*p = 10;
9.
++p;
10.
*p = 20;
11.
p[2] = 100;
12.
for (unsigned i = 0; i < myvector.size(); ++i)
13.
cout << ' ' << myvector[i];
14.
return 0;
15.
}
What is the output of this program?
1.
#include
2.
#include
3.
using namespace std;
4.
int main ()
5.
{
6.
vector first;
7.
first.assign (7,100);
8.
vector::iterator it;
9.
it=first.begin()+1;
10.
int myints[] = {1776,7,4};
11.
cout << int (first.size()) << '\n';
12.
return 0;
13.
}
What is the output of this program?
1.
#include
2.
#include
3.
using namespace std;
4.
int main ()
5.
{
6.
vector a (3, 0);
7.
vector b (5, 0);
8.
b = a;
9.
a = vector();
10.
cout << "Size of a " << int(a.size()) << '\n';
11.
cout << "Size of b " << int(b.size()) << '\n';
12.
return 0;
13.
}
a) Size of a 0
Size of b 3
b) Size of a 3
Size of b 5
c) Error
d) None of the mentioned