Q:

Print error message from any function with function name, line number in C

belongs to collection: C Preprocessors Programs

mahmoud2506
Save to bookmark
|
2022-05-04
|
  323 
0

Print error message from any function with function name, line number in C

Sometimes, it is necessary to print some message on logic failure or anytime with the function name and line number, so that program can be debugged and fixed the issue.

C programming, exam questions, C programming exam-questions,
login and add your own answer to this question

All Answers

mahmoud2506
2022-05-04
need an explanation for this answer? contact us directly to get an explanation for this answer

Prerequisite:

  • __LINE__: To print current line number
  • __func__: To print the name of the current function

Program:

#include <stdio.h>

float devide(int a, int b)
{
	float result;
	
	if(b!=0){
		result = (float)a/(float)b;
	}
	else{
		result=0;
		printf("Error at line %d in function "%s"\n",((__LINE__)-3),__func__);
		//ERROR at 3 lines above: ((__LINE__)-3)
	}

	return result;
}

int main()
{
	printf("%f\n",devide(10,3));
	printf("%f\n",devide(10,0));	
	return 0;
}

Output

3.333333
Error at line 9 in function "devide"
0.000000

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

C Preprocessors Programs
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
Macro Arguments Evaluation in C... >>
<< Print argument (i.e. variable name, value) using M...