71. Which of the following is the correct syntax of accessing the second element of a pair p?
72. Which function is invoked when an unhandled exception is thrown?
73. What will be the output of the following C++ code?
#include <iostream>
#include <array>
using namespace std;
int main(int argc, char const *argv[])
{
int arr1[5] = {1,2,3,4,5};
int arr2[5] = {6,7,8,9,10};
arr1.swap(arr2);
for(int i=0;i<5;i++)
cout<<arr1[i]<<" ";
cout<<endl;
for(int i=0;i<5;i++)
cout<<arr2[i]<<" ";
cout<<endl;
return 0;
}
#include <iostream>
#include <array>
using namespace std;
int main(int argc, char const *argv[])
{
int arr1[5] = {1,2,3,4,5};
int arr2[5] = {6,7,8,9,10};
arr1.swap(arr2);
for(int i=0;i<5;i++)
cout<<arr1[i]<<" ";
cout<<endl;
for(int i=0;i<5;i++)
cout<<arr2[i]<<" ";
cout<<endl;
return 0;
}74. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class Parent
{
public:
Parent (void)
{
cout << "Parent()\n";
}
Parent (int i)
{
cout << "Parent("<< i << ")\n";
};
Parent (void)
{
cout << "~Parent()\n";
};
};
class Child1 : public Parent { };
class Child2 : public Parent
{
public:
Child2 (void)
{
cout << "Child2()\n";
}
Child2 (int i) : Parent (i)
{
cout << "Child2(" << i << ")\n";
}
~Child2 (void)
{
cout << "~Child2()\n";
}
};
int main (void)
{
Child1 a;
Child2 b;
Child2 c(42);
return 0;
}
#include <iostream>
using namespace std;
class Parent
{
public:
Parent (void)
{
cout << "Parent()\n";
}
Parent (int i)
{
cout << "Parent("<< i << ")\n";
};
Parent (void)
{
cout << "~Parent()\n";
};
};
class Child1 : public Parent { };
class Child2 : public Parent
{
public:
Child2 (void)
{
cout << "Child2()\n";
}
Child2 (int i) : Parent (i)
{
cout << "Child2(" << i << ")\n";
}
~Child2 (void)
{
cout << "~Child2()\n";
}
};
int main (void)
{
Child1 a;
Child2 b;
Child2 c(42);
return 0;
}75. What will be the output of the following C++ code?
#include <iostream>
#include <algorithm>
using namespace std;
int main ()
{
int myints[] = { 10, 20, 30, 30, 20, 10, 10, 20 };
int* pbegin = myints;
int* pend = myints + sizeof(myints) / sizeof(int);
pend = remove (pbegin, pend, 20);
for (int* p = pbegin; p != pend; ++p)
cout << ' ' << *p;
return 0;
}
#include <iostream>
#include <algorithm>
using namespace std;
int main ()
{
int myints[] = { 10, 20, 30, 30, 20, 10, 10, 20 };
int* pbegin = myints;
int* pend = myints + sizeof(myints) / sizeof(int);
pend = remove (pbegin, pend, 20);
for (int* p = pbegin; p != pend; ++p)
cout << ' ' << *p;
return 0;
}76. What will be the output of the following C++ code?
#include <typeinfo>
#include <iostream>
using namespace std;
class Myshape
{
public:
virtual void myvirtualfunc() const {}
};
class mytriangle: public Myshape
{
public:
virtual void myvirtualfunc() const
{
};
};
int main()
{
Myshape Myshape_instance;
Myshape &ref_Myshape = Myshape_instance;
try
{
mytriangle &ref_mytriangle = dynamic_cast<mytriangle&>(ref_Myshape);
}
catch (bad_cast)
{
cout << "Can't do the dynamic_cast lor!!!" << endl;
cout << "Caught: bad_cast exception. Myshape is not mytriangle.\n";
}
return 0;
}
#include <typeinfo>
#include <iostream>
using namespace std;
class Myshape
{
public:
virtual void myvirtualfunc() const {}
};
class mytriangle: public Myshape
{
public:
virtual void myvirtualfunc() const
{
};
};
int main()
{
Myshape Myshape_instance;
Myshape &ref_Myshape = Myshape_instance;
try
{
mytriangle &ref_mytriangle = dynamic_cast<mytriangle&>(ref_Myshape);
}
catch (bad_cast)
{
cout << "Can't do the dynamic_cast lor!!!" << endl;
cout << "Caught: bad_cast exception. Myshape is not mytriangle.\n";
}
return 0;
}77. What will be the output of the following C++ code?
#include <iostream>
#include <sstream>
using namespace std;
int main()
{
stringstream mys(ios :: in | ios :: out);
std :: string dat("The double value is : 74.79 .");
mys.str(dat);
mys.seekg(-7, ios :: end);
double val;
mys >> val;
val = val*val;
mys.seekp(-7,ios::end);
mys << val;
std :: string new_val = mys.str();
cout << new_val;
return 0;
}
#include <iostream>
#include <sstream>
using namespace std;
int main()
{
stringstream mys(ios :: in | ios :: out);
std :: string dat("The double value is : 74.79 .");
mys.str(dat);
mys.seekg(-7, ios :: end);
double val;
mys >> val;
val = val*val;
mys.seekp(-7,ios::end);
mys << val;
std :: string new_val = mys.str();
cout << new_val;
return 0;
}78. What will happen in 'all_of' method if the range is empty?
79. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
int main()
{
int a = 10, b = 20, c = 30;
float d;
try
{
if ((a - b) != 0)
{
d = c / (a - b);
cout << d;
}
else
{
throw(a - b);
}
}
catch (int i)
{
cout<<"Answer is infinite "<<i;
}
}
#include <iostream>
using namespace std;
int main()
{
int a = 10, b = 20, c = 30;
float d;
try
{
if ((a - b) != 0)
{
d = c / (a - b);
cout << d;
}
else
{
throw(a - b);
}
}
catch (int i)
{
cout<<"Answer is infinite "<<i;
}
}80. To which of the following access specifiers are applicable?
Read More Section(C plus plus miscellaneous)
Each Section contains maximum 100 MCQs question on C plus plus miscellaneous. To get more questions visit other sections.
- C plus plus miscellaneous - Section 1
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- C plus plus miscellaneous - Section 8
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- C plus plus miscellaneous - Section 10
- C plus plus miscellaneous - Section 11