Help - cant compile c program with function

[Dave Chamberlin]

Been awhile since I did any c programs with function declarations. This gives error 1584 (inconsistant type declaration).

[Matti_Kurkela · Accepted solution]

You need to list the types in your function declaration too. Listing them in the function prototype only is not enough.

Change:
----
dc(a,b)
{
----
to:
----
double dc(double a, double b)
{
----

MK

[Dave Chamberlin]

The 1584 error is still there after changing the function to dc(double a, double b). Also tried chaning the declaration to double dc(double a, double b)

[Dennis Handly]

>MK: Listing them in the function prototype only is not enough.

It would also help if the prototype was at file scope.

[Dennis Handly]

>Also tried changing the declaration to: double dc(double a, double b)

What's the current source look like?

[Dave Chamberlin]

#include
#include


int main(void)
{
double a,b,intg;
double dc(double a,double b);


a=1.0;
b=2.0;

intg=dc(a,b);
printf("sum is %g\n",intg);
}

dc(double a,double b)
{
double q;
q=a+b;
return q;
}

[James R. Ferguson]

Hi Dave:

You didn't follow what Matti wrote:

...
double dc(double a, double b)
...

Regards!

...JRF...

[Dave Chamberlin]

That did it - thanks!

[Steven Schweda]

This is (well-designed) C, so no type in a
declaration is equivalent to "int", so:
dc( [...]
is equivalent to:
int dc( [...]
which is "inconsistant" with:
double dc( [...]


Does the message actually have "inconsistent"
spelled wrong, or was that your contribution?

[Dennis Handly]

>Steven: This is (well-designed) C,

But it is obsolescent in C99, so you shouldn't code that way.

>Does the message actually have "inconsistent"
spelled wrong?

No, the PA compiler gets that right: :-)
cc: error 1584: Inconsistent type declaration: "dc".
cc: error 1711: Inconsistent parameter list declaration for "dc".