Help with function declaration

•

What is DaniWeb IT Discussion Community?

You're currently browsing the C++ section within the Software Development category of DaniWeb, a massive community of 427,199 software developers, web developers, Internet marketers, and tech gurus who are all enthusiastic about making contacts, networking, and learning from each other. In fact, there are 2,278 IT professionals currently interacting right now! Registration is free, only takes a minute and lets you enjoy all of the interactive features of the site.

Join our community!

Please support our C++ advertiser: Programming Forums

Thread Tools Display Modes

Views: 430 | Replies: 2 | Solved

•

Join Date: Oct 2004

Location: San Francisco, CA

Posts: 338

Reputation: paradox814 is an unknown quantity at this point

Rep Power: 4

Solved Threads: 2

paradox814 paradox814 is offline

Offline

Posting Whiz

Help with function declaration

Mar 17th, 2008

I am working with a function declaration of:
int func1(char *, unsigned int)

to the best of my understanding, I am not allowed to modify this. Now my question is that when I actually write this program what is the name of argument 1 and 2

for example

Help with Code Tags

(Toggle Plain Text)

int intToHexStr(char *, unsigned int)
{
  //how do I reference the first argument?
  //and how do I reference the second argument?
}

Please help, thanks in advance!

•

Join Date: Aug 2007

Location: South Dakota

Posts: 861

Reputation: vmanes is a jewel in the rough

Rep Power: 6

Solved Threads: 86

vmanes

Offline

Practically a Posting Shark

Re: Help with function declaration

Mar 17th, 2008

What you've been given is the function prototype, which describes to the compiler the "signature" of the function. When you write your implementation (definition) of it, you must supply parameter names for the function to use. So in your program, it might look like:

 Help with Code Tags 
 c++ Syntax (Toggle Plain Text) 
#include <iostream>
using namespace std;
 
int func1(char *, unsigned int); //prototype, note the semicolon at end
 
int main( )
{
     char str[256] = "";
     int num = 3;
     int ret_val = 0;
 
     ret_val = func1( str, num );
 
     return 0;
}
 
int func1(char * foo, unsigned int bar) //parameter names here
{
      strcpy( foo, "hello" );
      for( int i = 0; i < bar; i++ )
          strcat( foo, " world" );
      return strlen( foo );
}
#include <iostream>
using namespace std;

int func1(char *, unsigned int); //prototype, note the semicolon at end

int main( )
{
     char str[256] = "";
     int num = 3;
     int ret_val = 0;

     ret_val = func1( str, num );

     return 0;
}

int func1(char * foo, unsigned int bar) //parameter names here
{
      strcpy( foo, "hello" );
      for( int i = 0; i < bar; i++ )
          strcat( foo, " world" );
      return strlen( foo );
}