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2018.6.19 Java Mock Exam (basic exercise)

calculation error problem, but also saves the programming memory to allocate the trouble.5, we put the keyword in the Java program before the method name, to implement the subclass calls the parent class method.Four, simple answer (5 points per question * 4 = 20 points)1. What are the similarities and differences between abstract class and interface (interface)?2. What is a Java virtual machine? Why is Java called a "platform-agnostic programming language"?3, explain the difference between over

1028:c Language Programming Tutorial (third Edition) after class exercise 8.1 using functions to find the number of conventions

The title description writes two functions, each for two integers greatest common divisor and least common multiple, calls these two functions with the main function, and outputs the result two integers by the keyboard input. Input two-digit output greatest common divisor least common multiple sample input6 15Sample output3 30Hint Sourceint main(){int a,m,n,cun,bei;scanf("%d %d",m,n);a=m*n;if(mwhile(n!=0){cun=m%n;m=n;n=cun;}bei=a/m;printf("%d %d",m,bei);return 0;}1028:c Language Programming Tuto

I wrote the python exercise myself.

String, shaping, floating-point, tuple elements (characters) of the index is immutable, cannot change is that you can use the variable name with square brackets, and then filled in square brackets inside the index value of the string, the index value is zero-based, and the list of words inside the element index value can be arbitrarily assigned valueWhen the slice has a step, the opening end is contained within it and is intercepted. But what if the slices have no stride size? The beginning cont

Python3 Exercise 2 list and dictionary exercises

Find the list of values greater than 100, give the dictionary dic's K1 key, less than or equal to 100 of the value, to the dictionary dic K2 key‘‘‘Tip: Two ways to create a dictionaryEx‘‘‘V1 = [2,3,4,5== = = {'K1'K2' = Dict (K1 = v1, K2 = v2,) Print (DIC1) Print (DIC2)List = [2, 5, 9, 20, 27, 80, 100, 110, 127, 158, 166, 198,]dic= {}#define an empty dictionary#method One:L1 = []#define two empty listsL2 = [] forIinchList#loop Find, traverse list element ifI > 100:#judging when the element val

C language Exercise: Second largest integer

the reason, the following code is always not get full marks, do not know which test error. Enthusiastic netizens can try to write to help me see it t.tBubbles are not a very sensible way to find the smallest possible.Ps:1, "66,66,66,66,66", there is no second largest number, nothing output.2, "99,99,88,86,68,66", the maximum number is 88.3. "0" does not output anything.#include int main (void){int x, y;int a[20]={0};int i=-1;int n;Do{i++;scanf ("%d", a[i]);}while (a[i]!=0iif (i>=1){X=A[0];Y=A[0

Wuhan University of Science and Technology acm:1008: Chinese Edition C language Programming tutorial (second edition) Exercise 6.14

Problem DescriptionEnter an octal string, convert it to an equivalent decimal string, and output it in the PRINGF%s format.InputFirst, a positive integer t is entered, indicating that there is a T set of test data (1Next T line, one string per line, representing an octal integer (this integer is no more than 20 bits).OutputFor each test data, output the corresponding decimal string. One line per string.Sample Input11732Sample Output986HINTNote: The given octal number may be large, with a long lo

Wuhan University of Science and Technology Acm:1005:c Language Programming Tutorial (third Edition) after class exercise 6.6

Problem DescriptionTo print out all the "daffodils", the so-called "Narcissus number" refers to a three-digit number, whose numbers are cubic and equal to that of itself. For example: 153 is a narcissus number, because 153=1^3+5^3+3^3. Output:153?????????InputNoOutputThe number of daffodils, the beginning of childhood. One per lineSample InputSample Output1#include 2 3#include 4 5 6 7 intMain ()8 9 {Ten One inti; A - for(i= -;i +; i++) - the if(I==pow (i

An exercise on the sed of the Three Musketeers of Linux

' a.txt still think it is-n[Email protected] tmp]#[[email protected] tmp]# sed-nr ' 3s#^.*88) \ ([0-9].*\] jia.*$#\1#g ' a.txt is not add-r?Sed:-E expression #1, char 32:unmatched) or \)[[email protected] tmp]# sed-n ' 3s#^.*88) \ ([0-9].*\] jia.*$#\1#g ' a.txt haven't found the reason[[email protected] tmp]# sed-n ' 3s#^.*88) \ ([0-9].*\] jia.*$#\1#g ' A.txt|xargs lsI haven't found a reason.A.txt P.txt Test.txt[[email protected] tmp]# sed-n ' 3s#^.*88) \ ([0-9].*\] jia.*$#\1#g ' A.txt|xargs ca

Linux Linux program Exercise IX

(); if(pid>0) {exit (0); } if(pid==0) {setsid (); ChDir ("/"); Umask (0); Close (Stdin_fileno); Close (Stdout_fileno); Close (Stderr_fileno); intI=0; Charbuf[ -]={0}; while(1) {Sleep (1); sprintf (BUF,"fly on air%d\n", i++); Writelog ("/home/test/1/testlog.txt", BUF); memset (BUF,0,sizeof(BUF)); } } return 0;}. suffixes:.c. OCC=Gccsrcs=hello.cobjs=$ (srcs:.c=. O) EXEC=tecdstart:$ (OBJS) -L.-lmylog-o $ (EXEC) $ (objs )"^_^-----OK------^_^". C.O: -wall-g-

Linux Network configuration Exercise

See if the NIC is installed properlyCommand: Lspci |grep ether1. Modify the NIC configurationCommand: Vi/etc/sysconfig/network-scripts/ifcfg-eth0Device=eth0Bootproto=none (dhct,static)Hwaddr=00:14:2b:1b:22:20Ipv6init=yesIpv6_autoconf=yesOnboot=yesnetmask=255.255.255.0ipaddr=192.168.1.241gateway=192.168.1.1Type=ethernetPeerdns=yesUserctl=noService Network restart2. Modify the hostname of the machineVi/etc/sysconfig/networkhostname=gao.com.cn3. Modify Host name query static tableVi/etc/hosts192.16

Linux command exercise: Mount Fdisk swap dd to create a local loopback device

] ~]# partprobe partprobe notify kernel Reread partition table, let kernel recognize new partition[Email protected] ~]# cat/proc/partitionsMajor Minor #blocks name8 0 20971520 SDA8 1 204800 sda18 2 8192000 Sda28 3 4096000 Sda38 4 1 SDA48 5 2048000 Sda58 6 2048000 Sda68 7 1536000 Sda78 8 1024000 The SDA8 kernel has identified the new partition, only the partition can be formatted, mounted, and so on. [[email protected] ~]# mke2fs-t ext4/dev/sda8 format/dev/sda8 partition as EXT4 type[[emailprotec

Linux Linux program Exercise 11 (Network programming large file send UDP version)

,sizeof(CLIENT_ADDR)); Num=recvfrom (St,buf,sizeof(BUF),0,(structSOCKADDR *) client_addr,Client_addrlen); if(num==-1) {printf ("Recvform failed! Error message:%s\n", Strerror (errno)); Break; } /*even if the sender is closed, the Recvfrom function will not return 0, but will continue to block the process*/ /*else if (num==0) {printf ("The other side sockets is closed!\n"); Break } */printf ("recv%d num=%d\n", index++, num); Fwrite (BUF,sizeof(Char), NUM,PFA); if(num1

Python Module Summary Exercise

ImportXml.etree.ElementTree as ET +Tree=et.parse ('A.xml') -root=tree.getroot () the * forYearinchRoot.iter (' Year'): $YEAR.TEXT=STR (int (year.text) +10)Panax Notoginsengyear.attrib={'Updated':'Yes'} -Tree.write ('A.xml') the + A the #=============================== "Increased + ImportXml.etree.ElementTree as ET -Tree=et.parse ('A.xml') $root=tree.getroot () $ - forCountryinchRoot.iter ('Country'): - #print (' year ') theYear=country.find (' Year') - #print (year)Wuyi ifInt

Python Beginner's little exercise

Practice for Linux, Unix-like systems, step by step improve python.001. Unix-like systems use the zip command to back up file compression to the/temporary/directory:ImportOSImportTimeold_files= ['/home/zhg/aa.py','home/zhg/bb.py']target_dir='/temporary/'Target= Target_dir + time.strftime ('%y%m%d%h%m%s') +'. zip'Zip_command="Zip-qr%s%s"% (target,' '. Join (old_files))ifOs.system (zip_command) = =0:Print "Successful backup to", Target_dirElse: Print "Error Backup failed"# The last command exec

March 27 Friday Classroom Exercise: Pair development----Returns the maximum number of sub-arrays in an integer array and three

First, the topic requirements1.1 Enter an array of integers with positive numbers in the array and negative values. 1.2 contiguous one or more integers in an array make up a sub-array, each of which has a and. 1.3 If the array a[0] ... A[j-1] next to each other, allowing a[i-1], ... A[n-1], a[0] ... A[J-1] and the largest. 1.4 Returns the position of the largest sub-array at the same time. 1.5 The maximum value of the and of all sub-arrays is evaluated. Requires a time complexity of O (n).Second

Exercise 8-3 Array Loop right shift (20 points)

The subject requires the realization of a simple function that loops the right of an array.A is stored inN>0) Integer to move each integer loop to the rightM≥0) a position that willThe data in a is determined by (A?0??A?1???A?N?1?? ) Transformation to (A?N?M???A?N?1??A?0??A?1???a? n? M? 1?? ) (Last m number of loops moved to the front M position). function Interface Definition:int ArrayShift( int a[], int n, int m );This is the user-passed array, the size of the array, and the a[] number of bi

Search Algorithm Little Exercise

() - { -Puts"Enter the number of rows in the maze and the start and end point of the mouse, and then enter the maze for each lattice point. Representative can go, #代表不可以走. "); -scanf"%d%d%d%d%d%d",n,m,x1,y1,x2,y2); in for(intI=1; i) - { to GetChar (); + for(intj=1; j) - { thescanf"%c",mi_gong[i][j]); * } $ }Panax Notoginseng } - BOOLCanmove (intXinty) the { + returnX>0x0y'.'b[x][y]==0; A } the voidDfs (intXintYintStep) + { - if(BB)return; $ if(x

Java Exercise (iii)--Number of daffodils

Title: Print out all the "daffodils", the so-called "Narcissus number" refers to a three-digit number, its number of cubes and equal to the number itself. For example: 153 is a "narcissus number", because the 153=1 three times the square +5 of the three +3 Times Square.Program Analysis: Use for loop control 100-999 number, each number decomposition out of bits, 10 bits, hundred. Public classTest1 { Public BooleanIsshui (intN) {intx=n/100;//Hundred inty= (n-x*100)/10;//10 Guests int

C + + pointer exercise

[] = {1,2,3,4,5}; + intAsize =sizeof(a)/sizeof(int); the intsum =swap3 (a,asize); -cout "the sum of all elements of array A is:"Endl; $ the //calculates the maximum number in an array the intB[] = {2,5, the, -,4,7}; the intBsize =sizeof(b)/sizeof(int); the int* t =Swap1 (b,bsize); -cout "The maximum number of all elements of array A is:"Endl; in the //Exchange values for two variables the intx =1, y =2; About int*pa = x, *PB = y; thecout "x=""; y="Endl; the

Python Exercise: function 1

Exercises: Defines a method func, which can introduce any number of integer parameters, and the result returns the largest and smallest values.def func(**args): return max(args),min(args) Defines a method, func, that can introduce any number of string arguments, and the result returns the longest string (length).def func(**args): max = args[0] max = max if len(max)>len(x) else x return max Defines a method Get_doc (module), which is the module object that is imported or defined in the sc

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