Logical Error With Type Conversion In C Post: 303021962

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Top Forums Programming Logical Error With Type Conversion In C Post 303021962 by Corona688 on Tuesday 21st of August 2018 03:03:49 PM

08-21-2018

Registered User

Quote:

Originally Posted by Azrael

Very odd. I had tried using letters in place of the numbers I had in the switch/case before, but I could not get it to work.

Single and double quotes are very different things in C. In C, "A" means a string -- amounting to the array { 'A', '\0' }. And 'A' is just the number 65.

Quote:

If I print out the m_array with something like this:

Code:

for (i = 0; i < DATA_SIZE; i++){
            printf("%x\n", m_array[i]);
    }

I get back an array of random numbers that I generated from another function:

Code:

 ./test | tail 
8885ffc9
77a822d5
bf34d05d
bc229af3
fc171fb9
ab7d3609
4815ef59
83facdc3
7d77bf58
881d17ea

Then I have another function that should randomly select an element from that array, or for any of the arrays from characters that match, and use one number to replace the letter given. Sorry if that wasn't clear.

Numbers that large won't fit in your input array. chars are numbers, but their range is only -128 through +127. It'll work fine if you use a separate array of type 'int' output.

Corona688

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LEARN ABOUT CENTOS

slaruv

slaruv.f(3)							      LAPACK							       slaruv.f(3)

NAME

       slaruv.f -

SYNOPSIS

   Functions/Subroutines
       subroutine slaruv (ISEED, N, X)
	   SLARUV returns a vector of n random real numbers from a uniform distribution.

Function/Subroutine Documentation
   subroutine slaruv (integer, dimension( 4 )ISEED, integerN, real, dimension( n )X)
       SLARUV returns a vector of n random real numbers from a uniform distribution.

       Purpose:

	    SLARUV returns a vector of n random real numbers from a uniform (0,1)
	    distribution (n <= 128).

	    This is an auxiliary routine called by SLARNV and CLARNV.

       Parameters:
	   ISEED

		     ISEED is INTEGER array, dimension (4)
		     On entry, the seed of the random number generator; the array
		     elements must be between 0 and 4095, and ISEED(4) must be
		     odd.
		     On exit, the seed is updated.

	   N

		     N is INTEGER
		     The number of random numbers to be generated. N <= 128.

	   X

		     X is REAL array, dimension (N)
		     The generated random numbers.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Further Details:

	     This routine uses a multiplicative congruential method with modulus
	     2**48 and multiplier 33952834046453 (see G.S.Fishman,
	     'Multiplicative congruential random number generators with modulus
	     2**b: an exhaustive analysis for b = 32 and a partial analysis for
	     b = 48', Math. Comp. 189, pp 331-344, 1990).

	     48-bit integers are stored in 4 integer array elements with 12 bits
	     per element. Hence the routine is portable across machines with
	     integers of 32 bits or more.

       Definition at line 96 of file slaruv.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012						       slaruv.f(3)