hi I am new to c++ and I am stuck in a question. I am a beginner, please help me, that you.
#include <iostream>
using namespace std;
int dostuff ()
{
return 2 + 3;
}
void fun ()
{
count_of_function_calls++;
}
int main()
{
void fun ();
void fun ();
void fun();
cout << "Function fun was called" << count_of_function_calls << "times";
}
Many, many problems, you should definitely read a C++ book or reread some tutorials
Where did you define count_of_function_calls?
Nowhere, that's why the compiler is complaining. You always have to declare variables before you use them:
int count_of_function_calls = 0;
Note that in your case, because you want to value of count_of_function_calls to be incremented for each function call, you should declare it as a global variable (this is not recommended, consider using something else).
A global variable is declared outside of any scope, in your case, you could for example defined it just above void fun ().
void fun (); declares a function (called fun), taking no arguments and returning void. It doesn't call the function fun. If you want to call a function, you don't have to specify the return type:
//Call function 'fun'
fun();
I think you forgot to define global variable count_of_function_calls
For example
#include <iostream>
using namespace std;
int count_of_function_calls;
int dostuff ()
{
return 2 + 3;
}
void fun ()
{
count_of_function_calls++;
}
//...
And the function calls must look like
fun();
This
void fun ();
is a function declaration. It is not a call of the function.