Question

Please help hint what to do. I have no idea how to fix these mistakes.

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Answer 1

@Sachintha

Answer 2

Remove void keyword and try.

Answer 3

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Why did his work?

Answer 4

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This is what he said about passing reference parameters to modules

Answer 5

You need to add the ampersand to the parameter name and not before the data type.

Answer 6

Hm, I don't quite understand.

Answer 7

Can you show me in my code?

Answer 8

\(\sf \color{blue}{void}~calculatesBmi(double~\color{red}{\&}weight, double~\color{red}{\&}height);\)

Answer 9

Got it! Alright, what about this error?
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Answer 10

Remember to close it!

Answer 11

Let me just give you the list of all the errors I have right now and we can work through them haha

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Answer 12

First check every line whether you have closed it properly. Most of the errors are due to missing semi-colons.

Answer 13

Fixed em. Down to five. : )

Answer 14

Const should be const. Make it all simple.

Answer 15

Down to four : )

Answer 16

Add a screenshot of the errors and edited code.

Answer 17

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Five actually

Answer 18

Yet you haven't closed everything properly. You have missed the variables and those inside the BMI function.

Answer 19

I haven't? But I put semicolons in the places that weren't working, and they worked?

Am I misunderstanding what you mean by close?

@Sachintha

Answer 20

But you haven't put semicolons after the variables height, weight inside main() and those inside the BMI function.

Answer 21

Alright, down to one error.
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Answer 22

Try adding the BMI variable inside main()

Answer 23

Hm, that didn't work.
@Sachintha

Answer 24

Show me how you added it.

Answer 25

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Answer 26

Why are you adding the void keyword?

Answer 27

double is a data type which is why I added it

Answer 28

No I meant why did you add the void keyword in-front of the calculatesBmi function? Did you sir say so?

Answer 29

Yes.

Answer 30

Add this code in line 31 and try. Not sure whether it would return anything.
BIM = calculatesBmi( weight, height);

Answer 31

It worked! Can you explain why it did?

Answer 32

Oh wait it says its an error now wth lol

Answer 33

What is the error?

Answer 34

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Answer 35

Try removing void keyword from the function. Also remove line 35.

Answer 36

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I'm not sure I can remove void because of my teacher

Answer 37

Wait I will try running it on a online compiler.

Answer 38

//Ashton Dreiling
//6/9:00 PM/2016
//BMI exercise

#include <iostream>
#include <stdlib.h>

using namespace std;

//module prototype
void calculatesBmi(double &weight, double &height);

//Global constant
const double KILOGRAM = 0.453592;

int main()
{
//some variables
double BMI;
double weight;
double height;


cout << "Hello, today we are going to be calculating your BMI" << endl;
cout << "Please type in your weight" << endl;
cin >> weight;
cout << "You typed in " << weight << endl;
cout << "Please type in your height" << endl;
cin >> height;
cout << "You typed in " << height << endl;
cout << "Please give us a second to calculate your BMI." << endl;
BMI = calculatesBmi( weight, height);

//pass variables to calculatesBmi module
cout << "Your BMI is " << BMI << endl;

system("Pause");


return 0;
}//end main

void calculatesBmi(double height, double weight)
{ //calculating BMI
double BMI;
BMI = weight / height * height;

}//end calculatesBmi

Answer 39

Do you have a note about the use of void given by your sir?

Answer 40

-for now the headers for all the C++ functions that you will write begin with the key word void
-following this you write the name of the function and a set of parentheses
-function header never ends with a semicolon

Answer 41

/*
This is a test for loading the MaxDensity curves
Ray Warren
22 May 2015
*/

#include <iostream>
#include <cstring>

using namespace std;

//module prototypes
void noReferenceParameters(int anInt, double aDouble, string aString);
void withReferenceParameters(int &anInt, double &aDouble, string &aString);

int main()
{
//some variables
int myInt = 1;
double myDouble = 1.0;
string myString = "Hello";

// output the variables
cout << "The variable values in main(): " << endl;
cout << " myInt: " << myInt
<< " myDouble: " << myDouble
<< " myString: " << myString << endl;

// call the no reference parameter module
noReferenceParameters(myInt, myDouble, myString);

// output the variables
cout << "The variable values in main(): " << endl;
cout << " myInt: " << myInt
<< " myDouble: " << myDouble
<< " myString: " << myString << endl;
cout << "They remain unchanged in main()" << endl;

// call the no reference parameter module
withReferenceParameters(myInt, myDouble, myString);

// output the variables
cout << "The variable values in main(): " << endl;
cout << " myInt: " << myInt
<< " myDouble: " << myDouble
<< " myString: " << myString << endl;
cout << "They are now changed in main()" << endl;

} //end main()

void noReferenceParameters(int anInt, double aDouble, string aString)
{
anInt = anInt * 2; // double it
aDouble = aDouble * 2; // double it
aString = aString + " World!";

// output the variables
cout << endl; // output a blank line
// "\t" is the tab character
cout << "\tThe variable values in noReferenceParameters(): " << endl;
cout << "\t myInt: " << anInt
<< " myDouble: " << aDouble
<< " myString: " << aString << endl;
cout << endl; // output a blank line

} //end noReferenceParameters()

void withReferenceParameters(int &anInt, double &aDouble, string &aString)
{
anInt = anInt * 2; // double it
aDouble = aDouble * 2; // double it
aString = aString + " World!";

// output the variables
cout << endl; // output a blank line
// "\t" is the tab character
cout << "\tThe variable values in withReferenceParameters(): " << endl;
cout << "\t myInt: " << anInt
<< " myDouble: " << aDouble
<< " myString: " << aString << endl;
cout << endl; // output a blank line

} //end withReferenceParameters()

Answer 42

Whew!! It worked. ^_^

#include <iostream>
#include <stdlib.h>

using namespace std;
//module prototype
void calculatesBmi(double &weight, double &height);

//Global constant
const double KILOGRAM = 0.453592;

int main()
{
//some variables
double weight;
double height;
double BMI;

cout << "Hello, today we are going to be calculating your BMI" << endl;
cout << "Please type in your weight" << endl;
cin >> weight;
cout << "You typed in " << weight << endl;
cout << "Please type in your height" << endl;
cin >> height;
cout << "You typed in " << height << endl;
cout << "Please give us a second to calculate your BMI." << endl;
calculatesBmi(weight, height);
//pass variables to calculatesBmi module
cout << "Your BMI is " << BMI << endl;

system("Pause");


return 0;
}//end main

void calculatesBmi(double &weight, double &height)
{ //calculating BMI
double BMI;
BMI = weight / (height * height);

cout << BMI;

}//end calculatesBmi

Answer 43

What did you change?

Answer 44

I added a line to output BMI inside the function and fixed some typos.

Answer 45

This one works. But I had to pass another reference parameter.

#include <iostream>
#include <stdlib.h>

using namespace std;
//module prototype
void calculatesBmi(double &BMI,double &weight, double &height);

//Global constant
const double KILOGRAM = 0.453592;

int main()
{
//some variables
double weight;
double height;
double BMI;

cout << "Hello, today we are going to be calculating your BMI" << endl;
cout << "Please type in your weight" << endl;
cin >> weight;
cout << "You typed in " << weight << endl;
cout << "Please type in your height" << endl;
cin >> height;
cout << "You typed in " << height << endl;
cout << "Please give us a second to calculate your BMI." << endl;

calculatesBmi(BMI,weight,height);
//pass variables to calculatesBmi module
cout << "Your BMI is " << BMI << endl;

system("Pause");


return 0;
}//end main

void calculatesBmi(double &BMI,double &weight, double &height)
{ //calculating BMI
BMI = weight / (height * height);
}//end calculatesBmi