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If the line: friend class A: appears in class B, and the line: friend class B: appears in class C. then: A) Class A is a friend of class C. B) Class A can access private variable Class B. C) Class C can call class A’s private member functions. D) Class B can access class A’s private variables. The correct function name for overloading the addition (+) operator is: A) operator+ B) operator(+) C) operator: + D) operator_+ Suppose you have a programmer-defined data type Data and want to overload the
Expert Answer
Following are the answers for mcq’s
35) – B) Class A can access private variables of class B
36) – A) operator+
37) – A) ostream &operator<<(ostream &output, const Data &dataToPrint)
39) – A) automobile
40) – C) When these members should be available only to derived classes (and friends), not to other clients
41)Programming Section:
The procedure and the calculations to convert the given binary number to decimal and hexadecimal is shown in the image. Code has been explained using comments
CODE:
#include<bits/stdc++.h>
using namespace std;
int main(){
int binary_number,remainder,decimal=0,base=1;
cout<<“Enter binary number”<<endl;
cin >> binary_number;
//Binary to decimal conversion
while(binary_number>0){
remainder = binary_number%10; // Get last digit
decimal=decimal+remainder*base; //multiply last digit with base and add to decimal variable
base = base * 2; // base is initially 1 and is multiplied with 2 in each iteration
binary_number = binary_number/10; //last digit is removed
}//while ends
cout<<“Decimal= “<<decimal<<endl;
//Decimal to hexadecimal conversion
char hexadecimal[100]; //char array to store hex value
int i=0,j;
while(decimal>0){
remainder=decimal%16; //get remainder by dividing decimal by 16
// to convert integer into character
if(remainder<10){
remainder=remainder+48;
}
else{
remainder=remainder+55;
}
hexadecimal[i]=remainder; //store character equivalent
i++;
decimal=decimal/16;
}
cout<<“Hexadecimal =”;
for(j=i;j>=0; j–){
cout<<hexadecimal[j];
}
return 0;
}//main method ends
Output:
Calculations:
