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I have to write a C++ function named MPG which returns the number of miles a car can travel with one gallon of gasoline. The function should have three parameters: the size of gas tank in gallons, number of miles traveled, and gasoline left in tank in gallons.
this is what I got
is it right? if not can show one give me a soultion
this is what I got
C++ Syntax (Toggle Plain Text)
is it right? if not can show one give me a soultion
We have a policy of not doing people's homework for them.
However, here are a few pointers to get you on the right track:
1. Understand types. What is a void? What is a char? What is a double? Once you understand types, which one seems most appropriate for mathematical calculations?
2. You function is called MPG. What does it mean to have "void" before the function name? Is it correct?
3. Your algebra is incorrect. Generally speaking, if you are given three pieces of information to solve a problem and you only use two of them, your solution might be incorrect.
However, here are a few pointers to get you on the right track:
1. Understand types. What is a void? What is a char? What is a double? Once you understand types, which one seems most appropriate for mathematical calculations?
2. You function is called MPG. What does it mean to have "void" before the function name? Is it correct?
3. Your algebra is incorrect. Generally speaking, if you are given three pieces of information to solve a problem and you only use two of them, your solution might be incorrect.
would you recommend using double instead? Are you saying void is not need?
Last edited by Jboy05; Feb 28th, 2008 at 5:19 pm.
>> function named MPG which returns the number of miles a car can travel with one gallon of gasoline
MPG() simply cannot be void, because it has to return the requested value.
MPG() simply cannot be void, because it has to return the requested value.
how about this then
C++ Syntax (Toggle Plain Text)
Last edited by Jboy05; Feb 28th, 2008 at 7:51 pm.
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Originally Posted by Jboy05 
how about this then
C++ Syntax (Toggle Plain Text)
Hope this helps.
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Originally Posted by Jboy05
how about this then
C++ Syntax (Toggle Plain Text)
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Originally Posted by superjacent
Think of it this way. You have two known pieces of information (gallons used and miles travelled), that is all you know. The third piece is what is calculated and is the purpose of the function - to calculate 'mile per gallon' (return). All the function needs to know are the two known pieces of information (arguments).
Hope this helps.
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Originally Posted by Jboy05
confused?
By the way, there's nothing wrong with reverting to a calculator to check/confirm results, even for simple problems. I do it all the time.
ok how does this look then
double MPG ( double sizeoftank, double number of milest, double gasleftintank)
{
numberofmilest=sizeoftank/gasleftintank;
return numberofmilest;
}
double MPG ( double sizeoftank, double number of milest, double gasleftintank)
{
numberofmilest=sizeoftank/gasleftintank;
return numberofmilest;
}
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Originally Posted by Jboy05
ok how does this look then
double MPG ( double sizeoftank, double number of milest, double gasleftintank)
{
numberofmilest=sizeoftank/gasleftintank;
return numberofmilest;
}
By the way, in the context of your function the variable 'numberofmilest' first needs to be initialised as a double.
Have you tested this function in a program?
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