C Plus Plus Miscellaneous - Study Mode
[#671] What will be the output of the following C++ code? #include <iostream>
#include <stack>
using namespace std
int main ()
{
stack<int> mystack
mystack.push(10)
mystack.push(20)
mystack.top() -= 5
cout << mystack.top() << endl
return 0
}
Correct Answer
(D) 15
[#672] What will be the output of the following C++ code? #include <iostream>
#include <functional>
#include <algorithm>
using namespace std
int main ()
{
int numbers[] = {1, 2, 3}
int remainders[5]
transform ( numbers, numbers + 5, remainders,
bind2nd(modulus<int>(), 2) )
for (int i = 0
i < 5
i++)
cout << (remainders[i] == 1 ? "odd" : "even") << "
"
return 0
}
Correct Answer
(D) odd even odd odd even
[#673] What will be the output of the following C++ code? #include <new>
#include<cstdlib>
#include <iostream>
using namespace std
class X
struct Node
{
X* data
bool filled
Node() : filled(false) { }
}
class X
{
static Node buffer[]
public:
int number
enum { size = 3}
void* operator new(size_t sz) throw (const char*)
{
void* p = malloc(sz)
if (sz == 0)
throw "Error: malloc() failed"
cout << "X :: operator new(size_t)" << endl
return p
}
void *operator new(size_t sz, int location) throw (const char*)
{
cout << "X :: operator new(size_t, " << location < ")" << endl
void* p = 0
if (location < 0 || location >= size || buffer[location].filled == true)
{
throw "Error: buffer location occupied"
}
else
{
p = malloc(sizeof(X))
if (p == 0)
throw "Error: Creating X object failed"
buffer[location].filled = true
buffer[location].data = (X*) p
}
return p
}
static void printbuffer()
{
for (int i = 0
i < size
i++)
{
cout << buffer[i].data->number << endl
}
}
}
Node X::buffer[size]
int main()
{
try
{
X* ptr1 = new X
X* ptr2 = new(0) X
X* ptr3 = new(1) X
X* ptr4 = new(2) X
ptr2->number = 10000
ptr3->number = 10001
ptr4->number = 10002
X :: printbuffer()
X* ptr5 = new(0) X
}
catch (const char* message)
{
cout << message << endl
}
}
Correct Answer
(C) Runtime error
[#674] What will be the output of the following C++ code? #include <iostream>
#include <complex>
using namespace std
int main()
{
complex <double> cn(3.0, 5.0)
cout<<arg(cn)<<endl
return 0
}
Correct Answer
(A) 1.03038
[#675] What will be the output of the following C++ code? #include <iostream>
#include <string>
#include <tuple>
using namespace std
int main()
{
tuple <int, char, string> tp
tp = make_tuple(4, '1', "Hello")
cout<<get<0>(tp)<<endl
cout<<get<1>(tp)<<endl
cout<<get<2>(tp)<<endl
return 0
}
Correct Answer
(D) 4 1 Hello