Question

6. (Short answer) The C++ code below is very close to working, but, as written, won't compile. When trying to compile, the compiler generates a number of errors similar to "cout' was not declared in this scope." Respond to the prompts below about the code.(20 points, 5 points each) #include <iostream> void FindMax(int a, int b, int& max) { if (a > b) max = a; else { max = b; } int main() { int num1 = 0; int num2 = 0; int max; cout << "Enter the first integer" << endl; cin >> numi; cout << "Enter the second integer" << endl; cin >> num2; FindMax (num1, num2, max); cout << "The max is " << max << endl; return 0; a) One line of code will fix all the "not declared" errors described above. What line of code is it 2 b) Briefly describe what the code does including: how many functions are present, what does each of the functions do, and what does the code as a whole do. Assume the code has been fixed as in part (a). c) Describe the FindMax function. Is it value returning? How many parameters does it take? Are they value or reference parameters? d) Does the FindMax function work correctly if a and b are equal? Why or why not?

Answer 1

hello,

let us answer each of the question together.

a) the code to fix all errors will be " using namespace std; " written just after the line " #include<iostream> ".

Note:- the code (correct code) is at last of the solution where changes had been made correctly)

c++ defines all the standard function like "cout" , "cin" ,"endl" in standard library namespace , in fact "std" is the short form of " Standard ", which is a library in c++.

b) The program has Two function and they are:-

1. The " main() " function. It is the function from where the execution of the code begins. The c++ compiler executes only main function of the code which calls all the others function attached with the main function. the program just takes user input on two "integer" type declared variables i.e., "num1" and "num2", and it send these two variable along with the third variable "max" as a parameter to the function "FindMax()".
2. The second function is "FindMax()" , which takes 3 parameter , two of them being the value of two input variable entered by user in main function the the third is simply the address of the third variable of main function i.e., variable "max". The function checks the greater between two numbers and stores the greater number in the address of variable "max" obtained from the main function as the parameter for the FindMax function.

The code as a whole finds the greatest number of two (the two numbers are user input value).

c) The function is "FindMax()" , which takes 3 parameter , two of them being the value of two input variable entered by user in main function the the third is simply the address of the third variable of main function i.e., variable "max". The function computes the greatest value of two by simply comparing them in if-else statement. the function stores the greatest value at the memory address stored in reference variable max inside the FindMax function iteself.

The 2 of 3 parameters are value parameters but the thirs parameter i.e., "int& max" is reference parameter.

d) Yes, the Find max function will work correctly if a and b are equal , because if they are equal , let they be a=5 and b=5 i.e., both the values are equal, then if we compare the values , the greatest value is 5 which is same i.e., either a or b . So the function is Correct.

just look at the output also:-

Enter the first integer Ennter the second integer The max is 5

The correct and Complete program is here:-

code starts here:-

#include<iostream>
using namespace std;
void FindMax(int a,int b,int& max)
{
   if(a>b){
   max=a;
   }
   else
   {
   max=b;
   }
}
int main()
{
int num1=0;
int num2=0;
int max;
cout<<"Enter the first integer"<<endl;
cin>>num1;
cout<<"Ennter the second integer"<<endl;
cin>>num2;
FindMax(num1 ,num2 ,max);
cout<<"The max is "<<max<<endl;
return 0;

}

code ends here:-

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