Why Does the 'Sensor' Structure Cause Multiple Definition Errors in C?

  • Thread starter Thread starter Lancelot59
  • Start date Start date
  • Tags Tags
    Structure
Click For Summary
SUMMARY

The discussion centers on the issue of multiple definition errors in C when defining and instantiating a structure in a header file. The user defined a structure named sensor_data in detector.h and created an instance of it named Sensor. The linker reported multiple definitions, which was traced back to the improper placement of the structure instantiation in the header file. The resolution involved moving the instantiation to the main function and ensuring proper use of pointers for function calls.

PREREQUISITES
  • Understanding of C programming language
  • Knowledge of struct definitions and instantiation
  • Familiarity with linker errors and scope of variables
  • Basic understanding of pointers and function prototypes in C
NEXT STEPS
  • Review C struct definitions and best practices for header files
  • Learn about variable scope and lifetime in C programming
  • Study pointer usage and function parameter passing in C
  • Explore common linker errors and their resolutions in C projects
USEFUL FOR

C programmers, software developers working with embedded systems, and anyone troubleshooting multiple definition errors in C code.

  • #31
Alright then, so that's fixed. I'll try compiling it soon. I went though the function listing and there is no monitor function defined. So I'm not too sure where this is coming from.
 
Physics news on Phys.org
  • #32
Change the name of your monitor function.
 

Similar threads

Fixing Syntax Error in C Structure for Robot IR Sensor Reading
  • · Replies 11 ·
Replies
11
Views
3K