ruby programming exercises

Programming exercisesUse JS to complete a simple calculator function. After you have entered an integer into the 2 input boxes, click on the third input box to give a subtraction of 2 integers.Tip: Get the value of the element set and get method for: Example: Assignment: document.getElementById ("id"). value = 1; var = document.getElementById ("id"). value;TaskThe first step: Create the build Operation function count ().Step two: Get the values in the

console from flashing through, you need to accept any characters after you close the console. return 0;//returns a shape to the execution environment, and 0 represents a successful execution. }Personal Understanding:The purpose of the exercise is to master the use of the For loop.In the actual programming process, you can choose the while and for any one of the loop statements, mainly depends on which kind of gengqing hi.The For statement is more

1. Traffic light Control:requirements : In the scenario where the SW1 switch is turned on, the traffic light controller starts to work and the controller stops working when the SW1 is turned off.SW2 for control mode selector switch:When the SW2 is turned off, the green, yellow, and red lights turn on, the specific timing is: green light 100 seconds, flash 5 seconds (every second light off once), yellow light 5 seconds, red light on 100 seconds.When the SW2 is turned on, the intersection becomes

Python core programming-Chapter 3-exercises, chapter 3 of python 1. This is a feature of python. python first creates an object. When assigning values to a variable, you do not need to define the name and type of the variable. Actually, it uses the variable to reference the object. The variable type is automatically declared when a value is assigned to the variable. 2. Similar reasons variables do not need

the last target only needs to be a file path. A the @AutoNext + defprintinfo (): - whileTrue: $F =yield $ if(F not inchDISTINCT):#append f to the distinct list when f this path value does not exist in distinct - distinct.append (F) - Print(F) the -Chioce = input ("Please enter the keywords you want to retrieve:")Wuyi #Here's the call in fact, not difficult, careful analysis will be easy to understand theGene =Inputgetpath (OpenFile (Catfile (Grepline (Printinfo (), Ch

;elsecdnum=$ (echo $input |cut-d ', '-f1) cdtitle=$ (echo $input |cut-d ', '-f2 ') cdtype=$ (echo $input |cut-d ', '-f3 ' cdac=$ (echo $input |cut-d ', '-f4) Fiecho "The name is $cdnum $cdtitle $cdtype $cdac" if get_confirm; theninsert_title $cdnum $cdtitle $cdtype $cdacadd _records_cdsreturnelse echo "You dont save the Record" Returnfi}add_records_cds () {echo "P Lease input The record ' s list name like this: "echo" Juhuatai,qianlizhiwai,... "reaD nameslocal k=$ (echo "$names" |awk-f ', ' {pr

calculates the tax. Use loops so that users can enter multiple times.#include The ABC Mail Order Grocery Artichoke is priced at $1.25/lb, the beet is priced at $0.65/lb, and the carrot is priced at $0.89/lb. Before adding shipping charges, they offer a 5% discount on orders of $100. Shipping and handling costs of $3.50 are charged for orders of 5 pounds or less, and orders over 5 lbs. and less than 20 lbs. for shipping and handling costs of 1o.oo USD: 20 pounds or more, plus $8 per pound on a $

/* * Eight queens Problem backtracking programming exercise * on the 8x8 chessboard, place 8 queens, two Queens cannot 22 attack * Also, straight line, vertical 45 degrees, 135 degrees direction cannot appear two queens * Copyright Michael 2014-12-19 * QQ 119206 5414 **/#include 8 Queen-----Backtracking C + + programming exercises

{ public static final int NUM = 3; public static void Main (String args[]) { try { Socket socket = new socket ("127.0.0.1", 4700); BufferedReader sin = new BufferedReader (new InputStreamReader (system.in)); PrintWriter OS = new PrintWriter (Socket.getoutputstream ()); System.out.println ("Three sides from the client receive triangle sent to the server:"); System.out.println ("Please enter 3 sides:"); String ReadLine = ""; For (int i = 0; i Os.flush ()

Reference for programming exercises after Chapter C and pointer -- Chapter 10th and Chapter 10th of Chapter c and pointer 10.1 1 #include 10.2 1 #include 10.3 1 #include

Reference for programming exercises in Chapter C and pointer -- 6.3, c and pointer 6.3 C and pointer -- 6.3 Question: Write a function to sort the characters in the parameter string in reverse order. Function prototype: Void reverse_string (char * string ); Requirements: Use Pointer instead of array subscript Do not use any C function library to manipulate strings. Do not declare a local array to temporaril

Random#产生随机集合Def randomset ():s = Set (")N = Random.randint (1,10)For I in Range (N):S.add (Random.randint (0,9))return sA = Randomset ()B = Randomset ()Print A, b#print a| B,ab# A = set ()# B = set ()# A.add (1)# A.add (2)# B.add (2)# Print a| B,ab#对输入进行处理, go [], Save as Collection#要考虑输入为空集的处理#输入格式为 [], turn into ', then set (')def input_to_set (S1):Set1 = set ()If S1! = ' [] ':U1,U2 = S1.split (' [')U1,U3 = U2.split ('] ')List1 = U1.split (', ')For I in List1:j = Int (i) #列表中单独字符串转换为数字Set1.a

Using system;using system.collections.generic;using system.linq;using system.text;using System.Threading.Tasks; Namespace consoleapplication1{ Class program {public class-Apple {public string info; Public Apple () { } public string app (string[] a) { foreach (string value in a) info + = value + "+"; Info=info. Substring (0,info. LENGTH-1); retur

, and if so, the number of occurrences of the statistic.Practice Code:public class Test {public static void Main (string[] args) {//defines a string s = "Aljlkdsflkjsadjfklhasdkjlflkajdflwoi UDSAFHAASDASD "; Number of occurrences int num = 0; Loop through each character to determine if it is a character a, if yes, the number of increments for (int i=0;iOperation Result: Three outputs the number of characters in a string Function: Write a program that outputs the

can use the pointer's offset or array subscript to manipulate(2)1 Char New CharNote that strlen does not count for empty characters, so there is less space in the heap memory allocation for empty characters, resulting in many functions not stopping reading at the end of this character.1 Char New Char 1Allocate one more, or you can use sizeof (note that sizeof points to the heap memory pointer to the size of the pointer).(3)You might be releasing the array heap memory like this.1 Delete PA; Com

Tag: the sum () function provided by Python can accept a list and sum please write a prod () function to accept a list and use the reduce () to calculate the product:1 #Python提供的sum () function can accept a list and sum, write a prod () function, you can accept a list and use reduce () to calculate the product:Code:2 3 from Functools import reduce 4 Li = [1,2,3,4,5,7] 5 print (sum (LI)) 6 7 def prod (x, y): 8 return x * y 9 Ten R = Reduce (Prod,li) one print (R)Operation Result:[[email protected

Practice 1-7 Writing a program that prints the values of EOF.#include // contains information about the standard library. int main () // defines a function named Main, which does not accept parameter values. { // output EOF. printf ("EOF" corresponds to the number of shapes is%d.) \ n", EOF); Getch (); // Prevent the console from flashing through, you need to accept any characters after you close the console. return0; // returns a shape to the execut

Practice 1-1 running the "Hello, World" program in your own system. Then deliberately remove part of the program, to see what error messages will be obtained.The code is as follows:#include // contains information about the standard library. int main () // defines a function named Main, which does not accept parameter values. { printf ("Hello, world\n"); // The man function calls the library function printf to display a sequence of characters. getch (); // Prevent t

Practice 1-18 Write a program that removes spaces and tabs at the end of each input line and removes rows that are completely blank.The code is as follows:#include //contains information about the standard library. #defineMAXLINE 10//the maximum number of characters per line is 1000. intGetlineCharLine[],intmaxline);intMain ()//defines a function named Main, which does not accept parameter values. { intLen; inti; CharLine[maxline]; while(len = getline (line, MAXLINE)) >0) { intc =

Exercise 1-15 Rewrite the temperature conversion program in section 1.2 and use the function to achieve temperature conversion calculations.The code is as follows:#include //contains information about the standard library. floatFahrtocelsius (floatFahr);floatCelsiustofahr (floatCelsius);intMain ()//defines a function named Main, which does not accept parameter values. {printf ("1 degrees Fahrenheit is equal to%.1f degrees Celsius .", Fahrtocelsius (1)); printf ("\ n"); printf ("1 degrees Celsius