What is the output of this C++ program?
#include <iostream>
using namespace std;
struct Time
{
int hours;
int minutes;
int seconds;
};
int toSeconds(Time now);
int main()
{
Time t;
t.hours = 5;
t.minutes = 30;
t.seconds=45;
cout << toSeconds(t) << endl;
return 0;
}
int toSeconds(Time now)
{
return 3600 * now.hours + 60 * now.minutes + now.seconds;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
namespace first
{
int var = 5;
}
namespace second
{
double var = 3.1416;
}
int main ()
{
int a;
a = first::var + second::var;
cout << a;
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
namespace first
{
int x = 5;
int y = 10;
}
namespace second
{
double x = 3.1416;
double y = 2.7183;
}
int main ()
{
using first::x;
using second::y;
bool a, b;
a = x > y;
b = first::y < second::x;
cout << a << b;
return 0;
}
What is the output of the following C++ program?
#include <iostream>
using namespace std;
class A
{
int id;
static int count;
public:
A() {
count++;
id = count;
cout << "constructor for id " << id << endl;
}
~A() {
cout << "destructor for id " << id << endl;
}
};
int A::count = 0;
int main() {
A a[3];
return 0;
}
What will be the output of below C++ program?
#include <iostream>
using namespace std;
class A
{
protected:
int x;
public:
A() {x = 0;}
friend void show();
};
class B: public A
{
public:
B() : y (0) {}
private:
int y;
};
void show()
{
A a;
B b;
cout << "The default value of A::x = " << a.x << " ";
cout << "The default value of B::y = " << b.y;
}
What is the output of this C++ program?
#include <iostream>
#include <typeinfo>
using namespace std;
int main ()
{
int * a;
int b;
a = 0; b = 0;
if (typeid(a) != typeid(b))
{
cout << typeid(a).name()<<" "<<typeid(b).name();
}
return 0;
}
What is the output of this C++ program?
#include <iostream>
#include <typeinfo>
#include <exception>
using namespace std;
class base
{
virtual void f(){}
};
class derived : public base {};
int main ()
{
try
{
base* a = new base;
base* b = new derived;
cout << typeid(*a).name() << '\t';
cout << typeid(*b).name();
}
catch (exception& e)
{
cout << "Exception: " << e.what() << endl;
}
return 0;
}
What is the output of this C++ program?
#include <typeinfo>
#include <iostream>
using namespace std;
class A
{
public:
virtual ~A();
};
int main()
{
A* a = NULL;
try
{
cout << typeid(*a).name() << endl;
}
catch (bad_typeid)
{
cout << "Object is NULL" << endl;
}
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
struct A
{
virtual void f()
{
cout << "Class A" << endl;
}
};
struct B : A
{
virtual void f()
{
cout << "Class B" << endl;
}
};
struct C : A
{
virtual void f()
{
cout << "Class C" << endl;
}
};
void f(A* arg)
{
B* bp = dynamic_cast<B*>(arg);
C* cp = dynamic_cast<C*>(arg);
if (bp)
bp -> f();
else if (cp)
cp -> f();
else
arg -> f();
};
int main()
{
A aobj;
C cobj;
A* ap = &cobj;
A* ap2 = &aobj;
f(ap);
f(ap2);
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
template<typename type>
class TestVirt
{
public:
virtual type TestFunct(type Var1)
{
return Var1 * 2;
}
};
int main()
{
TestVirt<int> Var1;
cout << Var1.TestFunct(100) << endl;
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
template<typename T>
inline T square(T x)
{
T result;
result = x * x;
return result;
};
int main()
{
int i, ii;
double y, yy;
i = 2;
y = 2.2;
ii = square(i);
cout<<i<<" "<<ii<<endl;
yy = square(y);
cout << y << " " << yy << endl;
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
template<typename T>
void loopIt(T x)
{
int count = 3;
T val[count];
for (int ii=0; ii < count; ii++)
{
val[ii] = x++;
cout << val[ii] << endl;
}
};
int main()
{
float xx = 2.1;
loopIt(xx);
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
template <class T, int N>
class mysequence
{
T memblock [N];
public:
void setmember (int x, T value);
T getmember (int x);
};
template <class T, int N>
void mysequence<T,N> :: setmember (int x, T value)
{
memblock[x] = value;
}
template <class T, int N>
T mysequence<T,N> :: getmember (int x)
{
return memblock[x];
}
int main ()
{
mysequence <int, 5> myints;
mysequence <double, 5> myfloats;
myints.setmember (0, 100);
myfloats.setmember (3, 3.1416);
cout << myints.getmember(0) << '\n';
cout << myfloats.getmember(3) << '\n';
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
template <class T>
T max (T& a, T& b)
{
return (a>b?a:b);
}
int main ()
{
int i = 5, j = 6, k;
long l = 10, m = 5, n;
k = max(i, j);
n = max(l, m);
cout << k << endl;
cout << n << endl;
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
template <class type>
class Test
{
public:
Test()
{
};
Test()
{
};
type Funct1(type Var1)
{
return Var1;
}
type Funct2(type Var2)
{
return Var2;
}
};
int main()
{
Test<int> Var1;
Test<double> Var2;
cout << Var1.Funct1(200);
cout << Var2.Funct2(3.123);
return 0;
}
What is the output of this C++ program?
#include <iostream>
using namespace std;
template <typename T, int count>
void loopIt(T x)
{
T val[count];
for(int ii = 0; ii < count; ii++)
{
val[ii] = x++;
cout << val[ii] << endl;
}
};
int main()
{
float xx = 2.1;
loopIt<float, 3>(xx);
}
Where does a cin stops it extraction of data?
Which is used to get the input during runtime in C++?
What is the output of this C++ program?
#include <iostream>
using namespace std;
int main ()
{
int i;
cout << "Please enter an integer value: ";
cin >> i + 4;
return 0;
}
What is the output of this C++ program?
#include <iostream>
#include <string>
#include <sstream>
using namespace std;
int main ()
{
string mystr;
float price = 0;
int quantity = 0;
cout << "Enter price: ";
getline (cin, mystr);
stringstream(mystr) >> price;
cout << "Enter quantity: ";
getline (cin, mystr);
stringstream(mystr) >> quantity;
cout << "Total price: " << price * quantity << endl;
return 0;
}
