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can anyone assiat in getting my function to work?
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Join Date: Dec 2004
Posts: 489
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Solved Threads: 5
Posting Pro in Training
Hello from what i can understand about function is that you need the prototype , then you need some kind of call function in the program and then the delcared function. Well I've done that but it doesnt want to work 
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#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std; // for std::cin, std::cout etc.
void f1();
int main()
{
int cointoss, heads = 0, tails = 0;
srand(time(0));
for (int counter = 0; counter <= 10; counter++)
{
cointoss = 1 + rand() % 2;
if (cointoss == 1)
{
cout << "Heads" << endl;
heads++;
}
else
{
cout << "Tails" << endl;
tails++;
}
}
cout << "there are a total of " << heads << " heads";
cout << " and " << tails << " tails" << endl;
f1();
cin.get(); // wait
return 0;
}
void f1(int i)
{
return heads - tails;
}
basically the function is ment to take the total of Heads and takewaya the total tails, stored at int tails and int heads but it doesnt want to excuted!
Would be reatful for assistance.
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Join Date: Sep 2004
Posts: 220
Reputation:
Solved Threads: 9
Posting Whiz in Training
You declared the function f1 as
but the definition specify that the function receive one parameter:
And, also, the return value is of void type.
As you say, the function has to return the difference between 2 variables, so it should have 2 parameters, and return an int value:
C Syntax (Toggle Plain Text)
C Syntax (Toggle Plain Text)
As you say, the function has to return the difference between 2 variables, so it should have 2 parameters, and return an int value:
C Syntax (Toggle Plain Text)
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Join Date: Dec 2004
Posts: 489
Reputation:
Solved Threads: 5
Posting Pro in Training
thanks for the reply so if your trying to make a protoype that takes more than 1 argument you must tell it? And if your returning something to the main() you should also have "int" . I guess I'm learning 
However in my prototype i have heads - tails, which should get the values from the head - tail in the int main() but instead i get a compile error saying head tail not declared!
However in my prototype i have heads - tails, which should get the values from the head - tail in the int main() but instead i get a compile error saying head tail not declared!
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Join Date: Sep 2004
Posts: 220
Reputation:
Solved Threads: 9
Posting Whiz in Training
You declared the head and tail variables inside of main function; they are not available for the f1 function.
When you declare a function, it should work like this:
In main, it should be:
Clear enough?
When you declare a function, it should work like this:
C Syntax (Toggle Plain Text)
C Syntax (Toggle Plain Text)
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Join Date: Dec 2004
Posts: 489
Reputation:
Solved Threads: 5
Posting Pro in Training
hello, ok could i make a prototype that took the values stored at int heads and tails, if i made them both global not local? that way could i just put the little calculation in the prototype?
like
int heads;
int tails;
int main()
int toss;
....make a statment that randomizes input to toss and stored the results at toss, and incrmements heads or tails depending on the value (1 or 2). is this possible since its outside the local varibles....
like
int heads;
int tails;
int main()
int toss;
....make a statment that randomizes input to toss and stored the results at toss, and incrmements heads or tails depending on the value (1 or 2). is this possible since its outside the local varibles....
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