Home/ Questions/Steps to fix floating point exception (core dumped) error
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Jules Lefort
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Asked: 2022-05-11T18:31:35+00:00 In:

Steps to fix floating point exception (core dumped) error

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Recently, I ran some of my p code, and it gave the warning text:

Floating point exception

While searching, I realized that some people added some command lines in my sample above. But I don’t think it is the best way to correct the problem – floating point exception (core dumped) How would you explain this trouble? or Is there a better way? Below is the detail of the command that I used

void Array_Loop( int *Array, int n, int L ) ;
 
 int Is_Prime( int Number ) ;
 
 int main( int argc, char *argv[] ){
 
  int **Array ;
  int n, L ;
 
  n = atoi( argv[1] ) ;
  L = atoi( argv[2] ) ;
 
  Matrix_Build( &Array, n, n ) ;
  Array_Loop( Array, n, L ) ;
 
 
  return 0 ;
 
 }
 
 void Array_Loop( int *Array, int n, int L ){
 
  int i, j, k, h ;
  int lctn, move;
 
  lctn = n / 2 + 1 ;
  i = lctn ;
  j = lctn ;
  move = 1
 
  while( i != 0 && j != n ){
 
  for( j = lctn ; j < lctn + move ; j++ ){
 
  if( L % 2 == 2) Array[i][j] = -1 ;
  else Array[i][j] = Is_Prime( L ) ;
  L++ ;
  }
 
  move = move * -1 ;
 
  for( i = i ; i > lctn - move ; i-- ){
 
  if( L % 2 == 2) Array[i][j] = -1 ;
  else Array[i][j] = Is_Prime( L ) ;
  L++ ;
  }
 
  move-- ;
 
  for( j = j ; j > lctn - move ; j-- ){
 
  if( L % 2 == 2) Array[i][j] = -1 ;
  else Array[i][j] = Is_Prime( L ) ;
  L++ ;
  }
 
  move = move * -1 ;
 
  for( i = i ; i < lctn - move ; i-- ){
 
  if( L % 2 == 2) Array[i][j] = -1 ;
  else Array[i][j] = Is_Prime( L ) ;
  L++ ;
  }
 
  move++ ;
 
  }
 
 }
 
 
 int Is_Prime( int Number ){
 
  int i ;
 
  for( i = 0 ; i < Number / 2 ; i++ ){
 
  if( Number % i != 0 ) return -1 ;
 
  }
 
  return Number ;
 
 }
floating point exception
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2 Answers

  1. Best Answer
    Expert

    The cause: You are receiving Floating point exception due to Number % i 0

    Solution: Start the loop at i = 2. It will always equal zero since i = 1 is Number % i, because Number is an int.

    int Is_Prime( int Number ){ 
  int i ; 
  for( i = 0 ; i < Number / 2 ; i++ ){
    if( Number % i != 0 ) return -1 ; 
  } 
  return Number ; 
}

     

    • 13

  2. Unexpected infinity or NaN can cause Floating Point Exception. You can monitor that with gdb. This allows you to track what’s happening inside your C program as it runs. For more details: https://www.cs.swarthmore.edu/~newhall/unixhelp/howto_gdb.php

    These commands may be of some use in a nutshell.

    gcc -g myprog.c

    gdb a.out

    gdb core a.out

    ddd a.out

    • 11

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