c subroutine

I told you how the subroutine can't pass a mutable array.When writing a Fortran program, to achieve a specific function of the matrix, such as the Gauss method to solve the linear equations, many times the subroutine does not know the size of the matrix, such as the finite element program first to use the program to obtain the total stiffness matrix and then gross position just passed in the sub-program to

Subroutines also have references, as well as anonymous subroutines. Suppose you already have an array, hash reference knowledge, so here is a brief introduction.$ref_sub = \mysub; # 子程序引用，符号必须不能少{$ref_sub}(ARGS) # 解除子程序引用，传递参数ARGS$ref_sub(ARGS) # 解除子程序引用$ref_sub->(ARGS) # 解除子程序引用$ref_sub->() # 传递空参数sub {...}; # 定义匿名子程序，sub后面没有名称$ref_sub = sub {...}; # 匿名子程序的引用With the subroutine reference, you

Subroutine calls and return commands 1. Call call DST;During the call, the IP or EIP pressure stack pushes the current value (the address of the next instruction of the Call Command) executed by the machine into the stack for the subroutine to return for use.2. return retIP output stack upon returnReturned command ret n with ParametersN is a 16-bit constant (even number). This command is to insert the retur

R14 is also known as the subroutine Connection register (subroutine link register) or the connection register LR. When executing the BL subroutine call instruction, a backup of R15 (program counter PC) is obtained in R14.In other cases, the R14 is used as the general register. Similarly, when an interrupt or an exception occurs, the corresponding packet registers

Turn from: http://www.ualberta.ca/dept/chemeng/AIX-43/share/man/info/C/a_doc_lib/libs/commtrf1/cbc_crypt.htm Purpose Implements Data Encryption Standard (DES) encryption routines. Library DES Library (libdes.a) Syntax # include int Ecb_crypt (keydatadatalenmode) char *key; char *data; Datalen; mode; int Cbc_crypt (keydatadatalenmodeivec) char *key; char *data; Datalen; mode; Ivec; void des_setparity (key) char *key; Description The ecb_crypt and cbc_crypt subroutines implement DES

I. subaccountProgramReferences: In Perl, you can not only create references to scalar variables, array variables, and hash variables, but also create references to subprograms. References to subprograms are similar to function pointers in C/C ++; the constructor is as follows: $ Pointer_to_sub = sub {# function body }; In this way, a reference to anonymous subprograms is established. The syntax for calling subprograms through subprograms is as follows: $ Pointer_to_sub (parameter list ); 1

The parameter modes of Oracle subprograms include IN, OUT, NOCOPY, IN and OUT, and OUT and NOCOPY. The parameter modes of Oracle subprograms include IN, OUT, NOCOPY, IN and OUT, and OUT and NOCOPY. IN is mainly used to input parameters, which can be variables, constants, and expressions. The value cannot be changed within the subroutine.The Code is as follows:DECLAREN NUMBER: = 10;PROCEDURE do_something (N1 in number) ISBEGINDbms_output.put_line (n1); -- prints 10-- N1: = 20; -- illegal assig

We usually use return (0) in the main function, and return a value in such a way.　　However, this is the form of void Main (), which is limited to non-void cases.　　Exit () is usually used to terminate the program in a subroutine, and the program automatically ends the jumping operating system after use.　　However, the value returned if main is defined as void is valid if the exit is used inside main, and exit does not need to consider the type, exit (1)

/****/packagecom.jason.kwic.mainsubroutine;importjava.io.file;import java.io.ioexception;importjava.util.arraylist;importjava.util.collections;import java.util.comparator;importjava.util.scanner;/*** KIWC Implementation * @author based on the main program/subroutine style jasonzhang**/publicclassmainsubroutine{privatearraylist This style is basically a class that implements all things.KIWC implementation based on the main program/

ETL scheduling development (4) -- file subroutine loading through FTP The most basic function of the ETL tool is to load files on the remote server. The following applet obtains files on the remote server in binary mode: #! /Usr/bin/bash # created by lubinsu #2014 source ~ /. Bash_profilefilename = $6 srcdir = $4 descdir = $5 ftpip = $1 ftpusr = $2 ftppwd = $3 # get filesftp-I-in The input parameters are: Remote Server IP address, user name, pas

in the 32-bit time counter is converted to the HH: mm: SS time format (ASCII characters) in a concise manner ), use another display subroutine to display the converted characters on the screen.Int1ch interruption occurs every 55 milliseconds. When an interruption occurs, add the content of the 32-bit time digital counter of 0040: 006ch--0040: 006eh plus one, 24 hours a day, the maximum count value is 001800b0h. When the maximum value is reached, int1

. Version 2The sub-program takes the middle content of text, text type. parameter full content, text type. parameter left text, text type. parameter right text, text type. local variable temporary position, integer typeTotal length of local variables, integer type. Local variables return results, text typeTotal length = text Length (full content)Temporary position = look for text (full content, left text,, false) + take text length (left text)return result = middle of text (full content, tempora

"C + + Primer" an exercise, I wrote when I encountered a few small problems, record:1, I think std::string::replace can only equal length string equivalent substitution (influenced by the C language string style), the fact that the old string and the new string is completely inconsistent length.2. The first simple version can actually replace success when written out, but there is a problem with a dead loop. For example, if there is "knife" in the source string, we need to replace "K" with "KC"

Interrupts are an important part of embedded systems, which leads to a lot of compiler developers providing an extension-letting standard C support break. The representative fact is that a new keyword __interrupt has been produced. The following code uses the __interrupt keyword to define an interrupt service subroutine (ISR), please comment on this code. __interrupt Double Compute_area (double radius){ Double area = PI * radius * RADIUS;printf ("ar