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Full Discussion: Compose variable name
Top Forums Shell Programming and Scripting Compose variable name Post 302192862 by potro on Thursday 8th of May 2008 04:05:46 AM
Old 05-08-2008
Quote:
Originally Posted by Annihilannic
Use eval to force the lines to be evaluated twice, once to insert the $CRT value, and a second time to do the assignment or substitution.

Code:
eval "$LISTENPORT"$CRT=$LPORT
...
eval echo "\$LISTEN_PORT$CRT"

Also $CRT++ is not valid shell syntax.
This is not working neither:
Please type the Listen Port and F when finish : (current value: 8081)
8082
./listen.sh: line 32: 1+1=8082: command not found
Please type the Listen Port and F when finish : (current value: 8082)
F
+1+1
 

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REMQUO(3)						   BSD Library Functions Manual 						 REMQUO(3)

NAME
remquo -- floating-point remainder and quotient function SYNOPSIS
#include <math.h> double remquo(double x, double y, int *quo); long double remquol(long double x, long double y, int *quo); float remquof(float x, float y, int *quo); DESCRIPTION
The remquo() functions compute the value r such that r = x - n*y, where n is the integer nearest the exact value of x/y. If there are two integers closest to x/y, n shall be the even one. If r is zero, it is given the same sign as x. This is the same value that is returned by the remainder() function. remquo() also calculates the lower seven bits of the integral quotient x/y, and gives that value the same sign as x/y. It stores this signed value in the object pointed to by quo. SPECIAL VALUES
remquo(x, y, quo) returns a NaN and raises the "invalid" floating-point exception if x is infinite or y is 0. VECTOR OPERATIONS
If you need to apply the remquo() function to SIMD vectors or arrays, using the following functions provided by the Accelerate.framework may give significantly better performance: #include <Accelerate/Accelerate.h> vFloat vremquo(vFloat x, vFloat y, vUInt32 *q); SEE ALSO
math(3), remainder(3) STANDARDS
The remquo() functions conform to ISO/IEC 9899:2011. BSD
December 11, 2006 BSD

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