I recently started learning C++ but I came across a problem. The program given below is not giving me the desired result as I only see 'Hi' in the result but not what's written in the void function. Please tell me the reason that this is happening along with the solution.
I am using Xcode 6.3.1 and the I have selected the language C++.
#include <iostream>
using namespace std;
void ABC () {
cout << "Hey there ! \n";
}
int main () {
cout << "Hi \n";
void ABC ();
return 0;
}
You are redeclaring a void ABC() function inside main(). Just call ABC(); without the void.
You can take a look at this question about declaring a function within the scope of another.
In your code your function call was wrong.
When you call your function you don't need to add the return type:
#include
void ABC () {
cout << "Hey there ! \n";
}
int main () {
cout << "Hi \n";
ABC ();
return 0;
}
you need to call your method and not declare it inside main
#include <iostream>
using namespace std;
void ABC () {
cout << "Hey there ! \n";
}
int main ()
{
cout << "Hi \n";
ABC ();
return 0;
}
EDIT 1: Since you started learning C++ i recommend the following recommendations to make sure your code is cleaner. Please note , these are not rules by any mean , but more of best practices and a style of coding.
Here's version 2 of your code with examples of 3 different methods and calls:
#include <iostream>
using namespace std;
int sum;
string MethodReturningString()
{
return "Hey there i am the result of a method call !";
}
int MethodReturningInt()
{
return 5;
}
void CalculateSum(int x,int y)
{
sum=x+y;
}
int main()
{
cout << MethodReturningString() << endl;
cout << MethodReturningInt() << endl;
cout << "Calculating sum:" ;
CalculateSum(5,4);
cout << sum << endl;
return 0;
}
Happy coding
In C++, like pretty much any other language, you do not specify the return type when calling a function. So change the line that reads:
void ABC ();
to:
ABC();
Try this:
#include <iostream>
using namespace std;
void ABC () {
cout << "Hey there ! \n";
}
int main () {
cout << "Hi \n";
ABC();
return 0;
}
You should call a function simply by stating its name and adding parentheses.
instead of using void ABC() for calling the function ABC() in main(), use the following code:
#include
void ABC ()
{
cout << "Hey there ! \n";
}
int main ()
{
cout << "Hi \n";
ABC ();
return 0;
}
void ABC();is a function declaration, not invocation. To invoke, writeABC();.