error messages

If my function prototype is:

Code:

void ltb_calculation(double deduction, double *ltb, double *gross_pay);

and my main function has the function(with the variables declared as doubles):

Code:

ltb_calculation(deduction, *ltb, *gross_pay);

and my function is:

Code:

void ltb_calculation(double deduction, double *ltb, double *gross_pay)
 {
  
if (( *gross_pay / 100)  > 0)
{
*ltb= *gross_pay / 100;

 if (*ltb > 50)
 {
  
*ltb == 50;

 }
deduction= *ltb * 2;
*gross_pay= *gross_pay - deduction;
}
}

WHY do i get these error messages saying: "Function argument assignment between types "double*" and "double" is not allowed." ???
I have a LOT of these messages as i did the same thing for each function. Some one help?

To pass the a non-pointer variable to a function, you use the address-of operator, not the happy little star.

Code:

void foo( int *ptr )
{
}

...

int x;

foo( &x );

Quzah.

Do you mean to change the main to:

Code:

ltb_calculation(deduction, &ltb, &gross_pay);

Because i'm trying that, and still getting the same error message. I think i misunderstood you?

That depends on what you have lbt and gross_pay declared as. See how simple it is to make a test case?

Code:

void ltb_calculation(double deduction, double *ltb, double *gross_pay)
{
    /* do nothing of importance */
    if( ltb ) *ltb = 0.0;
    if( gross_pay ) *gross_pay = 0.0;
    deduction = 0.0;
}

int main( void )
{
    double a, b, c;

    ltb_calculation( a, &b, &c );

    return 0;
}

Compile, run, be amazed!


Quzah.

Thanks. Maybe next time you should try it without as much sarcasm.

If I wanted your advice, I would have asked. Notice I didn't. Maybe by the nex time you ask, you'll have actually learned how to ask questions the smart way. Oh, since I'm here, you'll also notice that I answered your question correctly in the first post. If you hadn't have been so stupid, I wouldn't have had to answer the same question twice.


Quzah.