1 49 random number generator

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It is known that there is a rand7 () function, returns a random natural number from 1 to 7, and uses this rand7 () to construct rand10 () random 1 ~ 10

int rand7() { return rand()%7+1; } int rand10(){ int x=0; do { x=(rand7()-1)*7+rand7(); } while(x>40); return x%10+1;} Analysis: To ensure the even distribution of rand10 () on integers 1-10, you can construct a random integer interval with a

It is known that there is a rand7 () function, returns a random natural number from 1 to 7, and uses this rand7 () to construct rand10 () random 1 ~ 10

From: http://blog.csdn.net/furturerock/article/details/6850634View Code 1 int rand7() 2 { 3 return rand()%7+1; 4 } 5 6 int rand10() 7 { 8 int x=0; 9 do10 {11 x=(rand7()-1)*7+rand7();12 }13 while(x>40);14 return x%10+1;15 } Analysis: To ensure the even distribution of rand10 () on integers

Several colleagues in a variety of requests, for them to write the sports Lottery random number generator program, using cookies.

cookie| Program | Random /*----------------------------------------------------- At the request of a few colleagues, wrote the program for them, and I never buy lottery tickets, do not understand. But if you're really in the jackpot, don't forget to tell me. What are you afraid of me splitting your money? I am not greedy, the most send me a classic music dish I am very happy! By Jianglixin@163.net (hastily written, code messy collation) 2001.2.28 ---

It is known that there is a rand7 () function, returns a random natural number from 1 to 7, and uses this rand7 () to construct rand10 () random 1 ~ 10

1. Int rand7 ()2 .{3. Return rand () % 7 + 1;4 .}5.6. Int rand10 ()7 .{8. Int x = 0;9. Do10 .{11. x = (rand7 ()-1) * 7 + rand7 ();12 .}13. While (x> 40 );14. Return X % 10 + 1;15 .}Analysis: To ensure the even distribution of rand10 () on integers 1-10, you can construct a random integer interval with a

Multi-dimensional random number generation problem (solution) random number is 1

It's actually very easy to suddenly find the problem today X = rand (1, N) to generate [0, 1] Even random books... Y = x/sum (x )... Today, I encountered a problem when I wrote a random simulation program;X1, x2,..., xn random number

acm--Convention number is 1--hdoj 1014--uniform generator--water

) occurs means that if a function Would generate all the numbers between 0 and MOD-1, it'll generate pseudo-random numbers uniformly with every MOD Iterati Ons.If STEP = + MOD =, the function generates the series 0, 5 (or any other repeating series if the initial SE Ed is other than 0). This is a poor selection of STEP and MOD because no initial seed would generate all of the numbers from 0 and MOD-

Random number between 0-1 C + +

true sense. In order for the program to generate random values for a new sequence each time it executes, we usually provide a new random seed for the random number generator. The function Srand () (from stdlib.h) can spread the seed for the

PHP Basics (ii) 1, random number and time 2, String function

One, random number and timeRandom number generator (JS:math.random)echo rand ();Generate a random number in a rangeecho rand (0,10);Time stampecho Time ();Format the display of timeecho "echo Date ("Y-m-d h:i:s", Time ());echo "ec

The random number matrix of -1~1 between Python generation __python

1. Use function Np.random.random Because Np.random.random () defaults to generating decimals between 0~1, you need to convert such as the random number matrix between the -1~1 of generating 3*3 -

2016/1/14 Java random number generation

1. The static (static) method in the Math Library random ()The function of this method is to produce a double value between 0 and 1 (including 0, but not 1).double rand = Math.random ();2, through the Random class objectA program can generate many different types of

Python exercises two. Use the Randint function in random to randomly generate a preset integer between 1~100 to let the user keyboard enter the number of guesses.

the parameter is Ganso:In [41]: random.choice((1,3,7,4))Out[41]: 1In [42]: random.choice((1,3,7,4))Out[42]: 7 Random.shuffle: If you want to shuffle an element in a sequence (excluding Ganso and strings), you can use this function method In [49]: list = [1,2,3,4]In [50]: random.shuffle(list)In [51]: listOut[51]: [4, 2, 1, 3] Random.sample (A, B): A fragment of the specified length B

How to quickly generate a random number of 1 million non-repeated 8-bit even distribution?

Original article: http://www.cnblogs.com/nokiaguy/archive/2008/05/11/1191906.html 10000000 non-repeated random numbers must be generated between 99999999 and 1 million. You can create a table named Table1, which has two fields: the random number field generated (INT type) and the int type field. Use 99999999-1000

Take a random number within 1-15 (one command is done)

1. [[email protected] ~]# echo ' expr ${random}% 14 + 1 '10[Email protected] ~]#2. [[email protected] ~]# echo $ ((${random}% 14 + 1))4[Email protected] ~]#3. [[Email protected] ~]# echo $[${random}% 14 +

Enter two integers, n and m, from the numbers 1, 2, 3 ,...... Random Number in n to make it equal

Question 21: programming, input two integers n and m, from Series 1, 2, 3 ,...... N is random, so that the sum is equal to m. All possible combinations are required. It is actually a backpack problem. Solution: 1. First, determine that if nm is used, the number of n greater than m cannot be involved in the combination,

Select Sort algorithm to achieve 10 1-100 random number sorting

public class Mian {Log to select sortpublic static void Selectnumber (int[] number) {for (int i=0;iint m=i;for (int j=i+1;jif (Number[j]M=j;}if (i!=m) {Swap (NUMBER,I,M);}}}}Exchange two numberspublic static void swap (int number[],int I,int j) {int t;T=

The program creates a ArrayList, adds 10 random numbers from 1 to 10, deletes a number greater than 5 Java

Package Test;import Java.util.arraylist;import java.util.arrays;import java.util.list;import java.util.Random; public class Createarraylist {public static void main (string[] args) {listThe program creates a ArrayList, adds 10 random numbers from 1 to 10, deletes a number greater than 5 Java

"Face question" to an int array of length 100, insert 1-100 random number, cannot repeat

1 Public int[] Getnorepeatarrayy (intarrlength)2 {3 int[] Array =New int[arrlength];4ilistint> list =Newlistint>();5 //prepare data that is not duplicated6 for(inti =0; I )7 {8 list. ADD (i);9 }Ten //randomly inserting non-repeating data into an array One for(intj = (list. Count-1); J >-

PHP program implementation uses the RAND (1,100) function to generate a random number between 10 1~100

echo rand (1,100);$max = 0;$min = 100;for ($i =0; $i $rand [$i]=rand (1,100);if ($rand [$i]> $max) { $max = $rand [$i];}if ($rand [$i] $min = $rand [$i];}$str. = $rand [$i]. ",";}Remove the last comma$str. = "Quchu";$str =str_replace (", Quchu", "", $str);echo "Maximum number is:". $max;echo "echo "Minimum number is:" $min;echo "echo "prototype is:". $str;echo "echo "Median is:". Str_replace ($min. ",", "

Have 1~5000 a set of random sequence numbers, use pseudo-code to arrange the number

Make 1-5000 an array firstBubble Sort Method$arr =array (1,2,3,4,5,6,7,8,9.....5000);$total =count ($arr);for ($i =0; $i for ($j =0; $j If ($arr [$j]> $arr [$j +1]) {$tmp = $arr [$i];$arr [$j]= $arr [$j +1];$arr [$j +1]= $tmp;}}}Quick Sort Method$arr =array (1,2,3,4,5,6,8,9,......... 5000);$total =count ($arr);Function

A function that can generate a random number without repetition (1~inf)

1#include 2#include 3#include 4#include 5#include Set>6#include 7#include 8#include 9#include Ten using namespacestd; One A Const intN =1000007; - Const intINF =0x7fffffff; - theInlineintran () { - Static intSeed =703;//seed can take whatever - returnSeed =int(Seed * 48271LL%INF); - } + - Setint>s; + A intMain () at { - while(1) - { - s.clear (); - intFlag =

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