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/* For the sum of the first 5 items of sn = a + AA + AAA + AAAA + AAAAA, where A is a number, for example: 2 + 22 + 222 + 2222 + 22222*/#include int main (){int i = 0;int a = 0;int sum = 0;int num=0;scanf ("%d", num);for (i = 0; i {A = a * ten + num;sum = sum + A;}printf ("%d", sum);return 0;}Output Result:224690This article is from the "Rock Owl" blog, please be sure to keep this source http://10742111.blog.51cto.com/10732111/1711998c language; The s

). If you do not know these underlying mechanisms, you can simply stick back the rules "make destructors virtual in base classes" or "never treat arrays polymorphically", but do not understand the principles. Lin Yutang said: "Not brilliant ". Only know how, not know why. Difficulty 2 The second learning difficulty of C ++ is "paradigm shift" (Transfer of thinking mode ). Do not design your own classes. Simply using others' classes is a transfer of thinking and behavior patterns. MFC (or

Let the three side length, judge whether the triangle can be formed, if possible, to find its area and perimeterProgram:#include #include int Main (){Double A, B, C, D, S, area;printf ("Please enter three positive numbers:");scanf ("%lf%lf%lf", a,b,c);if ( (A + B > C) (A + C > B) (b + C > a)){D = A + B + C;s = 0.5*d;Area = sqrt (s* (s-a) * (s-b) * (s-c));printf ("d=%lf\tarea=%lf\t", D,area); //' \ t ' adjusts the output position to make the output data clear, neat and beautiful}Else{printf ("c

Static global variables: programs: #include This article is from the "Rock Owl" blog, please be sure to keep this source http://10742111.blog.51cto.com/10732111/1717851C Language: The difference between global and local variables

Given an uppercase letter, the program is printed in lowercase letters: #include This article is from the "Rock Owl" blog, please be sure to keep this source http://10742111.blog.51cto.com/10732111/1717860C language: Given an uppercase letter, output in lowercase letters

designed to be self-descriptive. XML is W3C recommendation standardXML is used to create a new Internet language. Many new Internet languages are created using XML: Examples include: XHTML-latest HTML version, WSDL-used to describe available web services, WAP and WML-markup language for handheld devices, RSS-used for RSS feed language, RDF and OWL-used to describe resources and ontology, and SMIL-used to describe web-targeted multimedia Here is a com

Print 99 multiplication tables.Program:Package MyClass;public class MyClass {public static void Main (string[] args) {for (int i=1;ifor (int j=1;jif (j>i) {Break}System.out.printf ("%d*%d=%d", i,j,i*j);}System.out.println ();}}}Results:1*1=12*1=2 2*2=43*1=3 3*2=6 3*3=94*1=4 4*2=8 4*3=12 4*4=165*1=5 5*2=10 5*3=15 5*4=20 5*5=256*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=367*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=498*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=649*1=9 9*2=18 9*3=27 9*4=36 9*5=4

script does personal backups to a rsync backup server. You'll end up# with a 7 day rotating incremental backup. The incrementals would go# into subdirectories named through the day of the week, and the current# Full backup goes to a directory called "current"# [Email protected]# Directory to Backupbdir=/home/$USER# excludes File-this contains a wildcard pattern per line of the files to excludeexcludes= $HOME/cron/excludes# The name of the backup machineBserver=

100, the original matrix column number is 100, the matrix sequence increment transpose algorithm, time consumption is O (number of valid data * The number of columns of the original matrix), that is, 100*100=10000 times; a fast transpose algorithm with time complexity of O (number of valid data + number of columns of original matrix) ), that is, about 100+100=200 times. Obviously, the time efficiency of the fast transpose algorithm is much higher than the sequential increment transpose method i

parent class object, and the parent object cannot be assigned to a subclass object;2. A pointer / reference to a parent class can point to a subclass object, and a pointer / reference to a subclass cannot point to the parent class object (can be done by forcing the type conversion)V. Scope in the Inheritance system:1. in the inheritance system, both the base class and the derived class have separate scopes. 2. Subclasses and parent classes have members of the same name, and child class members

explained.The first three entries are logging attempts to start vsftp FTP daemon (if you do not understand Daemo simply understand as a service, personal opinion, do not accept the Master spit Groove).Read this let's look at the log, CentOS 7 above the syslog, yes, it is not, hehe, the alternative is journalctl, as for this command does not explain, oneself can go to Baidu, here only need to know to use (JOURNALCTL-XN) good, information as follows:October 23:37:06 localhost.localdomain systemd[

Title: An integer, which is a complete square after the number, plus 168 is a complete square number, what is the number? Program analysis: In the judgment within the million, first of all, add the number after the prescription, and then add the number plus 268 after the root , if the result of the root to meet the following conditions , which is the result. Program Source code:#include #include int main (){long int i, x, y;for (i = 1; i{x = sqrt (i + 100);y = sqrt (i + 268);if (x*x = = i + +

;BONUS10 = BONUS6 + 400000 * 0.15;if (I {Bonus = i*0.1;}else if (I {Bonus = Bonus1 + (i-100000) *0.075;}else if (i {Bonus = Bonus2 + (i-200000) *0.05;}else if (i {Bonus = BONUS4 + (i-400000) *0.03;}else if (i {Bonus = BONUS6 + (i-600000) *0.015;}Else{Bonus = Bonus10 + (i-1000000) *0.01;}printf ("Total bonus payable: bonus=%ld\n", bonus);System ("pause");return 0;}Operation Result:Please enter monthly profit:1000000Total Prizes payable:bonus=100000Please press any key to continue ...This article

A class template is an abstraction of a class that is an instance of a class templateDefined within a class template:Class template name actual type name > object name;Class template name actual type name > object Name (argument table);Define member functions outside of the class template:TemplateVirtual type parameters >function type class template name virtual type parameter >:: member function name (function parameter list){...}such as : template class numtype > Numtype comparenum

said, you are OK, nothing to drink so much. The goddess turned and looked at my face. Whoa, spit it out straight. Also said to me, thank you ah, just no matter how buckle can not spit out, now see you finally spit out ... I feel like I'm not in loveduang~@ Chief of the torn skin : My 2015-Year Plan: 1. The spring Festival moves in a prize. 2.1th has not been reached this year no plan. This plan is for abortion, or there will be no complaining at the end of the year.@ Douen : @ Gillian OSC expo

of linear tablesvoid Mergelist (Seqlist *la, Seqlist *lb, Seqlist *LC){int i = 0, j = 0, k = 0;while ((I {if (La->elem[i] {Lc->elem[k] = la->elem[i];i++;k++;}Else{Lc->elem[k] = lb->elem[j];j + +;k++;}}while (i {Lc->elem[k] = la->elem[i];i++;k++;}while (J {Lc->elem[k] = lb->elem[j];j + +;k++;}Lc->last = la->last + lb->last + 1;}Advantages of the Sequential table: 1. There is no need to add additional storage space to represent the logical relationship between nodes;2. It is convenient to randoml

down detailed Xiang Xiang to enjoy the phase lane to the item Like the oak xiao Xiao 魈 owl xiao 萧潇 xiao Xiao Yao Xiao Xiao Xiao Shaw School filial piety wheezing effect laughter screaming some wedged wedge break Scorpion Evil Association threatened with a harmonic oblique to carry shoes blood write diarrhea anti-dandruff weapon Xie our crab core Xin Hinsing zinc xin New salary Xin Xin core letter Peacemaker Xing Xing Monkey slumber fishy execution fo

feature, feature combinations can be used in decision tree classes, generally with random forest or GBDT. The effect of GBDT should be better, because the boosting method will continuously enhance the ability to differentiate the wrong sample.For ad click-through estimates, there are three types of features at the same time. So a simple way to do this is to cascade the two methods to better feature combinations.3. LRA. owl-qnThis is the method of bat

");return 0;}Results:The volume of Box1 is:9000The volume of Box2 is:9450Please press any key to continue ...Example 2 defines two constructors, one of which has parameters, one without parameters, to find the volume of a long Fang. Solution: Create an ObjectBox1, no parameter is given, and the system finds the corresponding parameterless constructorBox,The result of executing this constructor is to make the3values for each data member areTen, and then outputBox1the volume of a building objectBo

The polar coordinate equation:r=cos (θ/3) +1/9 is drawn in different windows with four drawing methods using the Graph window segmentation method. Solution:MATLAB directive:Theta=0:0.1:6*pi;rho=cos (THETA/3) +1/9;>> Polar (Theta,rho)>>>> plot (Theta,rho)>> SEMILOGX (Theta,rho)>> Grid>> hist (rho,15)The results were as follows:650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M02/7D/E7/wKioL1byhmmCkktwAACog04CsqE000.png "title=" Picture 9.png "alt=" Wkiol1byhmmckktwaacog04csqe000.png "/>Figu