21. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
const int SIZE = 10;
class safe
{
private:
int arr[SIZE];
public:
safe()
{
register int i;
for (i = 0; i < SIZE; i++)
{
arr[i] = i;
}
}
int &operator[](int i)
{
if (i > SIZE)
{
cout << "Index out of bounds" <<endl;
return arr[0];
}
return arr[i];
}
};
int main()
{
safe A;
cout << A[5];
cout << A[12];
return 0;
}
#include <iostream>
using namespace std;
const int SIZE = 10;
class safe
{
private:
int arr[SIZE];
public:
safe()
{
register int i;
for (i = 0; i < SIZE; i++)
{
arr[i] = i;
}
}
int &operator[](int i)
{
if (i > SIZE)
{
cout << "Index out of bounds" <<endl;
return arr[0];
}
return arr[i];
}
};
int main()
{
safe A;
cout << A[5];
cout << A[12];
return 0;
}22. Which of the following is correct about friend functions?
23. Which function is used to get the length of a string object?
24. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class sample
{
public:
int x, y;
sample() {};
sample(int, int);
sample operator + (sample);
};
sample::sample (int a, int b)
{
x = a;
y = b;
}
sample sample::operator+ (sample param)
{
sample temp;
temp.x = x + param.x;
temp.y = y + param.y;
return (temp);
}
int main ()
{
sample a (4,1);
sample b (3,2);
sample c;
c = a + b;
cout << c.x << "," << c.y;
return 0;
}
#include <iostream>
using namespace std;
class sample
{
public:
int x, y;
sample() {};
sample(int, int);
sample operator + (sample);
};
sample::sample (int a, int b)
{
x = a;
y = b;
}
sample sample::operator+ (sample param)
{
sample temp;
temp.x = x + param.x;
temp.y = y + param.y;
return (temp);
}
int main ()
{
sample a (4,1);
sample b (3,2);
sample c;
c = a + b;
cout << c.x << "," << c.y;
return 0;
}25. What will be the output of the following C++ code?
#include <iostream>
#include <string>
using namespace std;
class A
{
static int a;
public:
void show()
{
a++;
cout<<"a: "<<a<<endl;
}
void operator.()
{
cout<<"Objects are added\n";
}
};
class B
{
public:
};
int main(int argc, char const *argv[])
{
A a1, a2;
return 0;
}
#include <iostream>
#include <string>
using namespace std;
class A
{
static int a;
public:
void show()
{
a++;
cout<<"a: "<<a<<endl;
}
void operator.()
{
cout<<"Objects are added\n";
}
};
class B
{
public:
};
int main(int argc, char const *argv[])
{
A a1, a2;
return 0;
}26. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
int main()
{
int x = 9;
int* p = &x;
cout << sizeof(p);
return 0;
}
#include <iostream>
using namespace std;
int main()
{
int x = 9;
int* p = &x;
cout << sizeof(p);
return 0;
}27. How many types of user-defined data type are in c++?
28. Which is the correct statement about operator overloading?
29. Which other keywords are also used to declare the class other than class?
30. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
const int limit = 4;
class safearray
{
private:
int arr[limit];
public:
int& operator [](int n)
{
if (n == limit - 1)
{
int temp;
for (int i = 0; i < limit; i++)
{
if (arr[n + 1] > arr[n])
{
temp = arr[n];
arr[n] = arr[n + 1];
arr[n + 1] = temp;
}
}
}
return arr[n];
}
};
int main()
{
safearray sa1;
for(int j = 0; j < limit; j++)
sa1[j] = j*10;
for(int j = 0; j < limit; j++)
{
int temp = sa1[j];
cout << "Element " << j << " is " << temp;
}
return 0;
}
#include <iostream>
using namespace std;
const int limit = 4;
class safearray
{
private:
int arr[limit];
public:
int& operator [](int n)
{
if (n == limit - 1)
{
int temp;
for (int i = 0; i < limit; i++)
{
if (arr[n + 1] > arr[n])
{
temp = arr[n];
arr[n] = arr[n + 1];
arr[n + 1] = temp;
}
}
}
return arr[n];
}
};
int main()
{
safearray sa1;
for(int j = 0; j < limit; j++)
sa1[j] = j*10;
for(int j = 0; j < limit; j++)
{
int temp = sa1[j];
cout << "Element " << j << " is " << temp;
}
return 0;
}Read More Section(Classes and Objects in C plus plus)
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