Variable gets auto updated after function execution
Hi Team
In the below code, irrespective of the if statement that gets executed, retcd is being assigned a standard value(1) instead of changing as per code. Could you please help to see where is it going wrong.
I would like to know how to pass a variable inside a variable to a function.
sample code below
--------------
for x in 1 9
do
check_null $C$x ##call function to check if the value is null
if
then
echo "line number:$var_cnt,... (2 Replies)
Hi ,
I have three funcions f1, f2 and f3 .
f1 calls f2 and f2 calls f3 .
I have a global variable "period" which i want to pass to f3 .
Can i pass the variable directly in the definition of f3 ?
Pls help .
sars (4 Replies)
Hello again :)
Am currently trying to write a function which will delete a record from a file.
The code currently looks as such:
function deleteRecord() {
clear
read -p "Please enter the ID of the record you wish to remove: " strID
... (2 Replies)
Hi,
I wrote the following program to understand mutexes. If I run the program , number of threads is shown as zero, even after creating one thread. When running with gdb, it works fine.
The function process is used to update global variable (used to keep track of threads). It looks like the... (2 Replies)
Hi,
I use KSH a lot.
I wanted to know if I can auto-complete a Variable name in the environment. I know this is possible in tcsh.
I use the vi mode to edit commands on command prompt.
Any help would be much appreciated.
Thanks..!! (4 Replies)
I have a function hello, that is echoing i have put that function in .bash1 file then recalling the function with same user but with su command but it is not working.
username -> test
function -> below function save in .bash1
function hello() {
echo "Hello, $1!"
}
export -f hello
I... (2 Replies)
I am having two different function in my script. When control is at first function I do not want to execute another function. How I can do that?
Help is highly appreiated as I am not sure How I can do it in Unix?
Thanks,
Vikram. (2 Replies)
Hello All,
I would like to ask help from you on how to pass variable value from a function that has been called inside the function. I have created below and
put the variables in " ". Is there another way I can do this? Thank you in advance.
readtasklist() {
while read -r mod ver... (1 Reply)
updateEnvironmentField() {
linewithoutquotes=`echo $LINE | tr -d '"'`
b()
}
I want to pass variable named $linewithoutquotes to another method called b(), which is called from updateEnvironmentField() method. How to do the above requirement with shell script (1 Reply)
Does anyone know why the below script is not working? Why is not the variable tot_files updated?
location=$1
cd "$location"
tot_files=0
(
echo ""
# recursively gets the total number of files
tot_files=$(for t in files ; do echo `find . -type ${t:0:1} | wc -l` $t | cut -f1... (12 Replies)
Discussion started by: soichiro
12 Replies
LEARN ABOUT BSD
bc
BC(1) General Commands Manual BC(1)NAME
bc - arbitrary-precision arithmetic language
SYNOPSIS
bc [ -c ] [ -l ] [ file ... ]
DESCRIPTION
Bc is an interactive processor for a language which resembles C but provides unlimited precision arithmetic. It takes input from any files
given, then reads the standard input. The -l argument stands for the name of an arbitrary precision math library. The syntax for bc pro-
grams is as follows; L means letter a-z, E means expression, S means statement.
Comments
are enclosed in /* and */.
Names
simple variables: L
array elements: L [ E ]
The words `ibase', `obase', and `scale'
Other operands
arbitrarily long numbers with optional sign and decimal point.
( E )
sqrt ( E )
length ( E ) number of significant decimal digits
scale ( E ) number of digits right of decimal point
L ( E , ... , E )
Operators
+ - * / % ^ (% is remainder; ^ is power)
++ -- (prefix and postfix; apply to names)
== <= >= != < >
= += -= *= /= %= ^=
Statements
E
{ S ; ... ; S }
if ( E ) S
while ( E ) S
for ( E ; E ; E ) S
null statement
break
quit
Function definitions
define L ( L ,..., L ) {
auto L, ... , L
S; ... S
return ( E )
}
Functions in -l math library
s(x) sine
c(x) cosine
e(x) exponential
l(x) log
a(x) arctangent
j(n,x) Bessel function
All function arguments are passed by value.
The value of a statement that is an expression is printed unless the main operator is an assignment. Either semicolons or newlines may
separate statements. Assignment to scale influences the number of digits to be retained on arithmetic operations in the manner of dc(1).
Assignments to ibase or obase set the input and output number radix respectively.
The same letter may be used as an array, a function, and a simple variable simultaneously. All variables are global to the program.
`Auto' variables are pushed down during function calls. When using arrays as function arguments or defining them as automatic variables
empty square brackets must follow the array name.
For example
scale = 20
define e(x){
auto a, b, c, i, s
a = 1
b = 1
s = 1
for(i=1; 1==1; i++){
a = a*x
b = b*i
c = a/b
if(c == 0) return(s)
s = s+c
}
}
defines a function to compute an approximate value of the exponential function and
for(i=1; i<=10; i++) e(i)
prints approximate values of the exponential function of the first ten integers.
Bc is actually a preprocessor for dc(1), which it invokes automatically, unless the -c (compile only) option is present. In this case the
dc input is sent to the standard output instead.
FILES
/usr/share/misc/lib.b mathematical library
dc(1) desk calculator proper
SEE ALSO dc(1)
L. L. Cherry and R. Morris, BC - An arbitrary precision desk-calculator language
BUGS
No &&, ||, or ! operators.
For statement must have all three E's.
Quit is interpreted when read, not when executed.
7th Edition October 21, 1996 BC(1)