Homework Function Help.

Below i Have 3 different functions I wrote for a homework assignment. I'm not sure what is wrong with them. Any help would be GREATLY Appreciated.

void airfare(double &airfareCost, double &airfareAllowd)
{
Cout<< "Enter cost of airefare"<<endl;
cin>> airfareCost<<endl;
airfareAllowd=airfareCost;

}


void milage(int miles, double &milageCost, double&milageAllowd)
{
cout<< "Enter cost of airefare"<<endl;
cin>> milageCost<<endl;
cout<<"Enter number of miles"<<endl;
cin<<miles<<endl;
milageAllowed= miles* 0.38 ;
}


Void taxi(int taxiDays, double &taxiCost, double&taxiAllowd)
{
cout<< "Enter number of days travelled"<< endl;
cin>>taxiDays<<endl;
cout<< "Enter Total cost of Taxi"<<endl;
cin>>taxiCost<<endl;
taxiAllowed=taxiDays * 10 ;
}

C++ is case sensitive.

Pay attention to the direction when using << and >>.

Use whitespace for improved readability.

So I messed up on << and >>? Was that the only thing?

Quote:

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Originally Posted by Poeticsoul44

So I messed up on << and >>? Was that the only thing?

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I don't do a lot of console programming, but I'm not sure sending endl to cin makes any sense.

I also mentioned that C++ is case sensitive.

Yea. I caught the error..But theres something else wrong with it because they wont compile for some reason.

Quote:

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Originally Posted by Poeticsoul44

Yea. I caught the error..But theres something else wrong with it because they wont compile for some reason.

---

There are lots of errors. I already pointed out the category. What does the compiler say?

the first gives the following errors:
air.cpp: In function &#226;void airfare(double&, double&)&#226;:
air.cpp:3: error: &#226;cout&#226; was not declared in this scope
air.cpp:3: error: &#226;endl&#226; was not declared in this scope
air.cpp:4: error: &#226;cin&#226; was not declared in this scope
air.cpp:5: error: &#226;airefareAllowed&#226; was not declared in this scope
air.cpp:5: error: &#226;airefareCost&#226; was not declared in this scope

The second funtion i get these errors:
miles.cpp: In function &#226;void milage(int, double&, double&)&#226;:
miles.cpp:3: error: &#226;cout&#226; was not declared in this scope
miles.cpp:3: error: &#226;endl&#226; was not declared in this scope
miles.cpp:4: error: &#226;cin&#226; was not declared in this scope

And the third gives me these errors:
taxi.cpp: In function &#226;void taxi(int, double&, double&)&#226;:
taxi.cpp:3: error: &#226;cout&#226; was not declared in this scope
taxi.cpp:3: error: &#226;endl&#226; was not declared in this scope
taxi.cpp:4: error: &#226;cin&#226; was not declared in this scope
[wm136158@adanew ~]$

Did you include iostream?

I just did and i get these errors for the first:
air.cpp: In function &#226;void airfare(double&, double&)&#226;:
air.cpp:4: error: &#226;cout&#226; was not declared in this scope
air.cpp:4: error: &#226;endl&#226; was not declared in this scope
air.cpp:5: error: &#226;cin&#226; was not declared in this scope
air.cpp:6: error: &#226;airefareAllowed&#226; was not declared in this scope
air.cpp:6: error: &#226;airefareCost&#226; was not declared in this scope


For the second i get:
miles.cpp: In function &#226;void milage(int, double&, double&)&#226;:
miles.cpp:4: error: &#226;cout&#226; was not declared in this scope
miles.cpp:4: error: &#226;endl&#226; was not declared in this scope
miles.cpp:5: error: &#226;cin&#226; was not declared in this scope

and the third i get:
taxi.cpp: In function &#226;void taxi(int, double&, double&)&#226;:
taxi.cpp:4: error: &#226;cout&#226; was not declared in this scope
taxi.cpp:4: error: &#226;endl&#226; was not declared in this scope
taxi.cpp:5: error: &#226;cin&#226; was not declared in this scope

Post your entire code as it is now.

First function code:
#include <iostream>
void airfare(double &airfareCost, double & airfareAllowed)
{
cout<< "Enter cost of airfare"<<endl;
cin>>airfareCost;
airefareAllowed=airefareCost;
}

2nd:
#include <iostream>
void milage(int miles,double &milageCost, double&milageAllowed)
{
cout<<"Enter cost of milage"<<endl;
cin>>milageCost;
cout<<"enter number of mile"<<endl;
cin>>miles;
milageAllowed= miles * 0.38;
}

3rd:
#include <iostream>
void taxi(int taxiDays, double &taxiCost, double&taxiAllowed)
{
cout<< "Enter number of days travelled"<<endl;
cin>>taxiDays;
cout<<"enter total cost of taxi"<<endl;
cin>>taxiCost;
taxiAllowed=taxiDays *10;
}

You forgot to put

Code:

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using namespace std;

---

at the top.

And there's no need to #include a file more than once in a given cpp.

I just included "using namespace std;" and get these errors:
1st:
air.cpp: In function &#226;void airfare(double&, double&)&#226;:
air.cpp:7: error: &#226;airefareAllowed&#226; was not declared in this scope
air.cpp:7: error: &#226;airefareCost&#226; was not declared in this scope
2nd:
miles.cpp: In function &#226;void milage(int, double&, double&)&#226;:
miles.cpp:4: error: &#226;cout&#226; was not declared in this scope
miles.cpp:4: error: &#226;endl&#226; was not declared in this scope
miles.cpp:5: error: &#226;cin&#226; was not declared in this scope
3rd:
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status

You're going to have to give us more to work with if you want help sorting this out.....

What all do you want to know?

The compiler is right. Check your spelling carefully.

You need a main function.

there is a main function, but i'm not in charge of that. This is a group project and my job is these 3 functions

Quote:

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Originally Posted by Poeticsoul44

there is a main function, but i'm not in charge of that. This is a group project and my job is these 3 functions

---

Did you follow my advice in post #16?

I think your teacher is trying to teach you the importance of coffee. Wake up!

Spelling things correctly isn't always important, but spelling variables the SAME is. ;p

Quote:

---

Originally Posted by Poeticsoul44

I just included "using namespace std;" and get these errors:
1st:
air.cpp: In function âvoid airfare(double&, double&)â:
air.cpp:7: error: âairefareAllowedâ was not declared in this scope
air.cpp:7: error: âairefareCostâ was not declared in this scope
2nd:
miles.cpp: In function âvoid milage(int, double&, double&)â:
miles.cpp:4: error: âcoutâ was not declared in this scope
miles.cpp:4: error: âendlâ was not declared in this scope
miles.cpp:5: error: âcinâ was not declared in this scope
3rd:
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status

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(1) Pay more attention to spelling. airefareAllowed != airfareAllowed

(2) You can compile but you cannot link your program unless you have a function with the signature "int main () or int main (int, char**).

(3) If you aren't responsible for main, write your own int main(void) that does some testing on your part of the code. Comment it out before you sent it to your collaborators.

(4) New programmers should not collaborate.