41. What happens when objects s1 and s2 are added?
string s1 = "Hello";
string s2 = "World";
string s3 = (s1+s2).substr(5);
string s1 = "Hello";
string s2 = "World";
string s3 = (s1+s2).substr(5);42. What does a mutable member of a class mean?
43. What will be the output of the following C++ code?
#include <iostream>
#include <string>
using namespace std;
class test
{
public:
operator string ()
{
return "Converted";
}
};
int main()
{
test t;
string s = t;
cout << s << endl;
return 0;
}
#include <iostream>
#include <string>
using namespace std;
class test
{
public:
operator string ()
{
return "Converted";
}
};
int main()
{
test t;
string s = t;
cout << s << endl;
return 0;
}44. What will be the output of the following C++ code?
#include <iostream>
#include <string>
#include <cstring>
using namespace std;
int main()
{
string s('a');
cout<<s;
return 0;
}
#include <iostream>
#include <string>
#include <cstring>
using namespace std;
int main()
{
string s('a');
cout<<s;
return 0;
}45. In the case of friend operator overloaded functions how many maximum object arguments a binary operator overloaded function can take?
46. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class sample;
class sample1
{
int width, height;
public:
int area ()
{
return (width * height);}
void convert (sample a);
};
class sample
{
private:
int side;
public:
void set_side (int a)
{
side = a;
}
friend class sample1;
};
void sample1::convert (sample a)
{
width = a.side;
height = a.side;
}
int main ()
{
sample sqr;
sample1 rect;
sqr.set_side(6);
rect.convert(sqr);
cout << rect.area();
return 0;
}
#include <iostream>
using namespace std;
class sample;
class sample1
{
int width, height;
public:
int area ()
{
return (width * height);}
void convert (sample a);
};
class sample
{
private:
int side;
public:
void set_side (int a)
{
side = a;
}
friend class sample1;
};
void sample1::convert (sample a)
{
width = a.side;
height = a.side;
}
int main ()
{
sample sqr;
sample1 rect;
sqr.set_side(6);
rect.convert(sqr);
cout << rect.area();
return 0;
}47. How many types are there in increment/decrement operator?
48. Which operator is having the highest precedence in c++?
49. How to unlimit the size of the stack?
50. What will be the output of the following C++ code?
#include <iostream>
using namespace std;
class Rect
{
int x, y;
public:
void set_values (int,int);
int area ()
{
return (x * y);
}
};
void Rect::set_values (int a, int b)
{
x = a;
y = b;
}
int main ()
{
Rect recta, rectb;
recta.set_values (5, 6);
rectb.set_values (7, 6);
cout << "recta area: " << recta.area();
cout << "rectb area: " << rectb.area();
return 0;
}
#include <iostream>
using namespace std;
class Rect
{
int x, y;
public:
void set_values (int,int);
int area ()
{
return (x * y);
}
};
void Rect::set_values (int a, int b)
{
x = a;
y = b;
}
int main ()
{
Rect recta, rectb;
recta.set_values (5, 6);
rectb.set_values (7, 6);
cout << "recta area: " << recta.area();
cout << "rectb area: " << rectb.area();
return 0;
}Read More Section(Classes and Objects in C plus plus)
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