Thread: Function definitions

Hey again Thanks for all the help on my project, the teacher hasn't grade it yet but hopefully I did everything correct and I was able to help one of my class mates with there code and got it to work without any code i had

Now she wants us to do a new project:
Write a program that ask the user for a number. Then displays the multiplication table for that number 0-10.

use the following function prototype and code the function definitions

int getNumber( );
void displayTable(int);

use a loop to calculate and display the table


I have it working but without the void displayTable(int); how could I make it including that?

Code:

#include <iostream>

using namespace std;
//Prototypes
int getNumber( );
//void displayTable(int);


int main()
{
    int tableAnswer;
    int firstNumber; 
 
    firstNumber=getNumber();
    
   int Number;
   for (Number=0; Number<=10; Number++)
   {
    tableAnswer=firstNumber*Number;
    cout<<firstNumber<<" x "<<Number<< " = "<<tableAnswer<<'\n';
}
     
    system ("pause");
	return 0;
}

int getNumber()
{
int Number;
      cout<<"Please enter a number"<<endl;
      cin>>Number;
     return Number;
}

/*void displayTable(int)
{
 int Number;
 for (Number=0; Number<=10; Number++)
 cout<<Number;
 }
 */

Hehe yes been confused >_<
mmm do you mean doing this stuff?

Code:

#include <iostream>

using namespace std;
//Prototypes
int getNumber( );
void displayTable(int);


int main()
{
    int tableAnswer;
    int firstNumber; 
    
    tableAnswer=displayTable();
    firstNumber=getNumber();
    
   
     
    system ("pause");
	return 0;
}
//function definitions
int getNumber(numberInput)
{
int numberInput;
      cout<<"Please enter a number"<<endl;
      cin>>numberInput;
     return numberInout;
}

void displayTable(int firstNumber)
{
  int Number;
   for (Number=0; Number<=10; Number++)
   {
    tableAnswer=firstNumber*Number;
    cout<<firstNumber<<" x "<<Number<< " = "<<tableAnswer<<'\n';
 }

It tells me i am doing something wrong with this part

Code:

//Prototypes
int getNumber( );
void displayTable(int);


int main()
{
    int tableAnswer;
    int firstNumber; 
    
    tableAnswer=displayTable();
    firstNumber=getNumber();

Yeah I was sorta in a group thing with my teacher today but this is due on Sunday and I have classes tomorrow so it doesn't leave me much time to do a study group lol last project I was really stuck took me about 4 days and most of those days were sleepless >_<



Thank you for explaining everything it aids to my learning lol even though I have o learn backwards cause I am a visual leaner so I look at the code first and then try to figure out how it works with what you wrote hehe Thanks a lot

OF course it's wrong!
Remember your previous lesson: the function takes one argument, but you pass NONE!
About declarations and definitions... I recommend that you put variable names in declarations AND definitions because usually compilers use your declarations for intellisense (eg to show you what parameters a function takes) and it's very vague sometimes hard to know what type of arguments it takes if there's just two "int." Instead, put names on them in the declaration instead and you'll find it easier. It should work in both C and C++.

Also, first you should get the number, and then pass it to function that will display table. At the moment you're doing it in wrong order.

Wait which part is wrong??

Fix your function call and use the debugger to find out. You can do that, can't you?

no I've never really done function calls before. I was only able to make it work the 1st way I did it but I wanted to use the other function too.

Then how come you are using functions if you've never learned how to use them?

because its a project

http://www.cprogramming.com/tutorial/lesson4.html

Perhaps that's overkill since lifeis2evil is still new to functions.

its not overkill. it is a very useful part of the language and it is not like it's that hard.