[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

returned values in ANSI C

Posted on 2004-04-18
4
Medium Priority
?
257 Views
Last Modified: 2011-09-20
Well I'm not the best when it comes to ANSI C programming...but i thought this was for sure.
Let's say we have the code

#include <stdio.h>

int test()
{
     return 1;

}

void main()
{
     int t;
     t=test();
     printf("t=%d\n", &t);
}

I expected that the output at the screen would be "t=1"....It's not it's something like 1245052 and doen't seem somehow connected to the value the test() functin returns...
The problem is how can I save the value that a function returns into a variable...In this specific case how can I save somewhere the value "1".
0
Comment
Question by:jonn_g
  • 2
2 Comments
 
LVL 44

Accepted Solution

by:
Karl Heinz Kremer earned 800 total points
ID: 10852738
This has nothing to do with the return value, the problem is that you are passing the address of t to the printf function, and not t. Use this:

printf("t=%d\n", t);

You probably got this confused with scanf, which needs and address so that the value of the variable can actually be modified. You need to understand the difference between "pass by value" and "pass by reference"
0
 
LVL 44

Expert Comment

by:Karl Heinz Kremer
ID: 10852742
... and just in case it's not clear, the value "1" was already correctly saved in the "t" variable.
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

Whether you've completed a degree in computer sciences or you're a self-taught programmer, writing your first lines of code in the real world is always a challenge. Here are some of the most common pitfalls for new programmers.
If you are a mobile app developer and especially develop hybrid mobile apps then these 4 mistakes you must avoid for hybrid app development to be the more genuine app developer.
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …
Screencast - Getting to Know the Pipeline

873 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