Which line in the following program contains the header for the showdub function? 1 #include 2 using namespace std; 3 4 void showdub(int); 5 6 int main() 7 { 8 int x = 2; 9 10 showdub(x); 11 cout < < x < < endl; 12 return 0; 13 } 14 15 void showdub(int num) 16 { 17 cout < < (num * 2) < < endl; 18 } 1. 4 2. 6 3. 10 4. 1

The answer to this question is "15 line".

Explanation:

A function is a block of ordered, portable code used to perform a single, connected operation. The syntax of function declaration can be given as:

Syntax :

returntype functionName(parameter1, parameter2); //function prototype

or declaration

returntype functionName(parameter1, parameter2) //function definition or header of the function  

{  

//function body.

//function implementation

 //return value;

}

In the given question the header of the showDub function is on line 15.

That's why the answer to this question is "15 line".  

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