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Top Forums Shell Programming and Scripting Fibonacci series -going into infinite loop Post 302962179 by Rookie222 on Wednesday 9th of December 2015 11:47:38 AM
Old 12-09-2015
Linux Fibonacci series -going into infinite loop

Hello, I am a beginner to shell programming. Coded the following for Fibonacci series.

Code:
#!/bin/bash
fib()  {

i=0
j=1
arr[0]=0
arr[1]=1

echo "enter the limit:"
read n

while [ $i -lt $n ]
do
    fo= expr $j - 1
    f1=$j
    f2= expr $j + 1
    arr[$f2]= expr ${arr[$f1]} + ${arr[$f0]}
    echo ${arr[$f2]}
    
    i= expr $i + 1
    j= expr $j + 1
    
done
}

fib



The program is going into infinite loop. From debugging I understood that updated i,j values are not being carried to next iteration of while loop. Why is it so? Can someone please help.

Last edited by Don Cragun; 12-09-2015 at 02:55 PM.. Reason: Add CODE and ICODE tags.
 

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DATEFMT_LOCALTIME(3)							 1						      DATEFMT_LOCALTIME(3)

IntlDateFormatter::localtime - Parse string to a field-based time value

	Object oriented style

SYNOPSIS
public array IntlDateFormatter::localtime (string $value, [int &$position]) DESCRIPTION
Procedural style array datefmt_localtime (IntlDateFormatter $fmt, string $value, [int &$position]) Converts string $value to a field-based time value ( an array of various fields), starting at $parse_pos and consuming as much of the input value as possible. PARAMETERS
o $fmt - The formatter resource o $value - string to convert to a time o $position - Position at which to start the parsing in $value (zero-based). If no error occurs before $value is consumed, $parse_pos will contain -1 otherwise it will contain the position at which parsing ended . If $parse_pos > strlen($value), the parse fails immedi- ately. RETURN VALUES
Localtime compatible array of integers : contains 24 hour clock value in tm_hour field EXAMPLES
Example #1 datefmt_localtime(3) example <?php $fmt = datefmt_create( 'en_US', IntlDateFormatter::FULL, IntlDateFormatter::FULL, 'America/Los_Angeles', IntlDateFormatter::GREGORIAN ); $arr = datefmt_localtime($fmt, 'Wednesday, December 31, 1969 4:00:00 PM PT', 0); echo 'First parsed output is '; if ($arr) { foreach ($arr as $key => $value) { echo "$key : $value , "; } } ?> Example #2 OO example <?php $fmt = new IntlDateFormatter( 'en_US', IntlDateFormatter::FULL, IntlDateFormatter::FULL, 'America/Los_Angeles', IntlDateFormatter::GREGORIAN ); $arr = $fmt->localtime('Wednesday, December 31, 1969 4:00:00 PM PT', 0); echo 'First parsed output is '; if ($arr) { foreach ($arr as $key => $value) { echo "$key : $value , "; } } ?> The above example will output: First parsed output is tm_sec : 0 , tm_min : 0 , tm_hour : 16 , tm_year : 1969 , tm_mday : 31 , tm_wday : 4 , tm_yday : 365 , tm_mon : 11 , tm_isdst : 0 , SEE ALSO
datefmt_create(3), datefmt_format(3), datefmt_parse(3), datefmt_get_error_code(3), datefmt_get_error_message(3). PHP Documentation Group DATEFMT_LOCALTIME(3)
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