Solved

syntax

Posted on 2000-05-01
1
187 Views
Last Modified: 2010-04-15
I get this error...

cc: Warning: numday.c, line 33: In this statement, "*total" of type "int", is be
ing converted to "pointer to int".
                        *total=31+numday(month-1, day, *total);
----------------------------------^
cc: Warning: numday.c, line 35: In this statement, "*total" of type "int", is be
ing converted to "pointer to int".
                        *total=30+numday(month-1, day, *total);
----------------------------------^

With the problem in this part of the code...

int numday(int month, int day, int *total)
        {

        if(month==1)
                *total=day;
        else if(month==2)
                *total=28+day;
        else
                {
                if(month==3||month==5||month==7||month==8
                  ||month==10||month==12)
                        *total=31+numday(month-1, day, *total);
                else
                        *total=30+numday(month-1, day, *total);
                }

        }

void printresults(int total, int month, int day)
        {
        printf("%d/%d is day %d of the year.", month, day, total);
        }


int main(void)

        {
        int month, day, total;

        getdata(&month, &day);

        numday(month, day, &total);

        printresults(total, month, day);

        }                



0
Comment
Question by:SaraBiz
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 1

Accepted Solution

by:
jasonf earned 50 total points
ID: 2768149
In the recursive call to numday you are dereferencing total and passing its value.  Your function prototype, however, wants you to pass an address where the data resides.  In other words, don't dereference total in the argument list in the recursive calls to numday.  That should work.

Look at the error, then think about what it is saying...I will break it down for you.

The error is:
cc: Warning: numday.c, line 33: In this statement, "*total" of type "int", is being converted to "pointer to int".

The line of code where the error occurs:
*total=31+numday(month-1, day, *total);

The prototype for the function numday:
int numday(int month, int day, int *total)

What does *total refer to?  It is the value in the memory location addressed by the value of total.  That value happens to be an int.

Now look at the 3rd argument in the prototype for numday.  It is looking for a pointer to int, in other words an address.  When you look at the value stored at that address it has to be an int (hence 'pointer to int').  Do you now see why you are getting the error you are getting?

Hope this helps and hope my explanation clears up some of the confusion with passing pointers to functions and what the notation means.

Jason
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Preface I don't like visual development tools that are supposed to write a program for me. Even if it is Xcode and I can use Interface Builder. Yes, it is a perfect tool and has helped me a lot, mainly, in the beginning, when my programs were small…
Examines three attack vectors, specifically, the different types of malware used in malicious attacks, web application attacks, and finally, network based attacks.  Concludes by examining the means of securing and protecting critical systems and inf…
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use for-loops in the C programming language.
The goal of this video is to provide viewers with basic examples to understand opening and reading files in the C programming language.

751 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question