C/C++ :: Generate Random Doubles Within Certain Value Ranges?

Apr 25, 2014

I made this pthread/mutex program that makes deposits and withdrawals of random amounts. I have it working how I wish, however, I cannot figure out how to make it so that the random values are only within certain ranges. For example, let's just say I want all deposits to be random doubles between 50.00 to 100.00 and withdrawals between 25.00 to 50.00, or something similar.

#include<stdio.h>
#include<string.h>
#include<pthread.h>
#include<stdlib.h>

[Code].....

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C :: Generate Random Numbers

Mar 17, 2013

I'm trying to generate random numbers so that I can assign people to teams. So far I have come up with this

Code:

int generateTeam(){
int i, teamNumber, c, n;
for (c = 0; c <= 5; c++) {
n = rand()%100 + 1;
}

[code]....

}//end generateTeam I'm not sure how to make it so that I can exclude the previous random number when generating the next one. As an example, I have 22 students and I get the number 19. Now I can't have 19 again because that guy already has it.

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C :: Generate Random Number Between 50 And 200

Oct 15, 2014

I'm trying to write a program that generates a random number between 50 and 200. I made a program that generates random numbers, but how to make those random numbers be in-between 50 and 200. Any example of a program that generates random numbers that are confined in-between certain values?

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C# :: How To Generate Random Word

Mar 6, 2014

I just can't seem to get this right. What I want to happen is when the program runs a random word should pop up.

I have included my code. I'm not sure by putting tag around my code.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;

[Code].....

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C++ :: Generate Random Numbers To A File?

Apr 3, 2013

The program is to generate random numbers to a file and will have one integer parameter, Open a file and then using a loop write the required number of random numbers to the file. Scale the random numbers from 1 and 100 inclusive. Then closes the file .The last function will read the numbers in the file into your program. so far i have

Code: #include <iostream>
#include <string>
#include <iomanip>
#include <ctime>
#include <fstream>
#include <cstdlib>

[Code] .....

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C :: Program To Generate A Random Sentence

Oct 31, 2013

so I'm creating a program that generates random sentences with structs..I'm trying to use structs and and create 4 different groupings article, noun, verb, and preposition. Then I'm trying to use "r = rand() % ;" to randomly pick one one word from each group to make a sentence. this is what i have

Code:

typedef enum article {
the = 1, a, one, some, any
} article;
typedef enum noun {
boy = 1, girl, dog, town, car
}

[code]....

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C :: How To Generate Random Color Names

Sep 7, 2013

I want to print different color names for "nb " times . I get the number " nb " from the user or from text file . if " nb = 3 " then I want to print any 3 different color names which means that I may print ( red , green , blue ) for example . and if " nb=5 " then I have to print any five different color names ( pink , blue , black , red ,white ) fore example .

Note : " nb " may be a large number ( 17 for example ). How can I do this ?

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C :: Can't Generate Number In Random Function

Jun 16, 2013

i just search random function, there are random function using rand();but when i compile this code

Code:

#include <stdio.h>
int main(){
int a;
a = rand();
printf("%d",a);
}

[code].....

i ask to you that is function to generate the number, why the number is cannot generate

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C++ :: How To Generate 3 Random Numbers Between 1 And 6 Using Function

Apr 30, 2013

I am trying to generate 3 random numbers between 1 and 6 using a function called generate_rand. but everytime im having an error : no oprators "<<" matches these operands and the last error was :end of file found before the left brace

my program is the following :

# include<iostream>
#include<cstdlib>
using namespace std;

[Code]....

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C++ :: Generate Random Numbers Between Given Values

Mar 14, 2013

srand (time(NULL));
for(int i=0; i<N; i++) {
points[i].x=(rand()%(32767-(-32767)))+(-32767);
points[i].y=(rand()%(32767-(-32767)))+(-32767);
cout<<"x="<<points[i].x<<endl;
cout<<"y="<<points[i].y<<endl;
}

Im trying to generate random numbers between -32767 and +32767, where im going wrong, this code generates only negative numbers

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C++ :: How To Generate And Then Store Random Number

Nov 6, 2014

So I have to generate a random number between 1 and 6 and then store that same random number into an int variable. Eg, if the random number is 4, that must be stored into int i.

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C++ :: Generate Independent Random Number?

May 30, 2013

Is it possible that have a function or class can generate independent random number . And I can use it any time.

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C++ :: Generate Random Permutation In Array

Feb 16, 2013

I'm currently working on assignment which requires to generate a random permutation of the first N integers. For example, if N = 4, one possible answer is {3,1,2,4} without duplicates. {3,3,2,4} is not correct

to fill a[4], generate random numbers until you get one that is not already in a[0], a[1], ..., a[n-1]. for a[0] whatever random number you generate can be put in it. So here is my code. It seem to works but sometime it give duplicates.

#include <iostream>
#include <stdlib.h>
#include <time.h>

[Code].....

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C++ :: Generate Random Data (fast)

Feb 20, 2013

I just want to know how fast can C++ generate data? For example, I have a downstream device that is connected to my pc via a Gigabit Ethernet, and I have to generate some pattern and send it over the Gigabit interface.

I was curious if there is a way that I can see how fast I can generate data? I was curious if I can exercise a good portion of the bandwidth ! for example, sending about 600 Mbits/sec.

How do I find out, first, whether I can do this with C/C++, and, second, how do I know how fast I am sending data?

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C++ :: Generate Random Numbers Within Specific Range?

Jun 5, 2014

So, there has got to be an easier way to generate random numbers within a specific range. Here is the code that I have been using, for a range of 1-6:

#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;

[Code]....

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C++ :: Generate Skew Distribution Random Number?

May 27, 2013

How to generate a skew distribution random number? Or is there any place having refer the skew distribution random number?

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C++ :: Program To Generate Random Number Between 1 To 100 - While Loop Will Not End

Feb 21, 2014

My program asks me to write a C++ program that generates a random number between 1-100, and lets the user guess the number until he/she guesses correctly.

I have every thing done but my loop will not end. I know I have to "update" the loop to end it but I don't know what that means.

#include <iostream>
#include <iomanip>
#include <ctime>
using namespace std;

int main() {
srand(time(NULL)); //the function that generates random numbers

[Code] .....

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C++ :: Generate Random Number In The Range -501 To + 50 Inclusive

May 3, 2014

Write an instruction to generate a random number in the range -501 to + 50 inclusive.

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C++ :: Generate Random Strings From A To Z With A Length Of 3 For Each Generation

Sep 16, 2014

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <string>
#include <ctime>
using namespace std;
string randstr(int);
int main()

[Code]...

I want to generate random strings from A to Z with a specific length of 3 for each generation. For example:

BRC
YUG
YFH

How do I fufill this with the code presented and the function at the bottom?

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C/C++ :: How To Execute For Loop And Generate A Random Number

Oct 24, 2014

I have to write a C++ program that picks a random number between 0 and 49. If the number is even lets say 30, then the computer will display 30, 32, 34, 36... all the way till 100, if its odd lets say 17, then the computer will display 17, 19.. till 99. I got the computer picking a random number, I just can't figure out how to display every other number using a for loop statement. Here's my code for random number generator:
   
#include <iostream>
#include <cstdlib> 
#include <ctime>  
using namespace std;  
int main()  

[Code] ....   

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C :: Generate Pseudo Random Real Number From Interval (0,1)

Feb 6, 2013

How can I generate a pseudo-random real number from interval [0,1] ?

Can it be generalized to any interval? Like [0,a], where 'a' is a parameter?

I tried searching for it, I only found rand(), srand(), random(1), and randomize. None of it actually seems to work for me..

Later I actually succeeded with something like

srand( (unsigned)time( NULL ) );
printf( " %6d
", rand() );

but it only produces up to five digits integers and I cannot divide by 99999 to get it into [0,1].

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C++ :: How To Generate Real Random Number From Normal Distribution

Jun 26, 2013

I want to generate random numbers of normal distribution and use scentence like

std::default_random_engine generator;
std::normal_distribution<double> distribution(0,1);
arrayX[i][j]=distribution(generator);

But I find that each time the array I got are the same. So how should I generate random numbers with different seedings with normal distribution?

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C++ :: Generate 100 Random Integers Between 0 And 9 And Displays Count For Each Number

May 3, 2013

I've been currently stuck on a C++ problem. Here's the question:

Write a program that generates one hundred random integers between 0 and 9 and displays the count for each number. (Hint: Use rand()

% 10 to generate a random integer between 0 and 9. Use an array of ten integers, say counts, to store the counts for the number of O's, l 's, . .. , 9's.)

I think I'm pretty close, but I keep on getting "0" for the occurrences (or counts) of each random integer.

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <conio.h>
#include <fstream>
using namespace std;
const int SIZE = 100;

[Code] .....

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C++ :: Generate Array Of Random Numbers - Searching Algorithm

Jan 31, 2013

My program generates an array of random numbers. I want to then search a specific number within the array. If the number is in the array then a message apopears on the console saying that its there. I'm using the binary search algorithm to do this.

#include <iostream>
#include <ctime>
#include <cstdlib>
#include <iomanip>
#include <cstring>
using namespace std;
int size;
int getSize() { return size; }

[Code] ......

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C++ :: Generate Random Number Between Two Numbers (User Input)

Jul 26, 2014

I am trying to generate a random number between two numbers that the user gives me.

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
void rand_int(const int &min, const int &max, int &val);

[Code] .....

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C++ :: Generate Random Integers In The Range And Store Them In A Vector

Sep 3, 2014

You are to write a C++ program to generate random integers in the range [ LOW = 1, HIGH = 10000 ] and to store them in a vector < int > of size VEC_SIZE = 250. Then, sort the contents of the vector (in ascending order) and display it on stdout.

To sort the contents of a vector, use the sort ( ) function from the STL. In addition to the main ( ) routine, implement the following subroutines in your program:

• void genRndNums ( vector < int >& v ) : This routine generates VEC_SIZE integers and puts them in vector v. Initializes the random number generator (RNG) by calling the function srand ( ) with the seed value SEED = 1, and generates random integers by calling the function rand ( ).

• void printVec ( const vector < int >& v ) : This routine displays the contents of vector v on stdout, printing exactly NO_ITEMS = 12 numbers on a single line, except perhaps the last line. The sorted numbers need to be properly aligned on the output. For each printed number, allocate ITEM_W = 5 spaces on stdout.

Programming Notes:

• You are not allowed to use any I/O functions from the C library, such as scanf or printf. Instead, use the I/O functions from the C++ library, such as cin or cout.
• Let v be a vector of integers, then the call: sort ( v.begin ( ), v.end ( ) ) sorts the elements of v in ascending order. The detailed description of the sort ( ) routine can be found on the course web site and in the course textbook.
• Execute the srand ( ) function only once before generating the first random integer with the given seed value SEED. The rand ( ) function generates a random integer in the range [ 0, RAND_MAX ], where the constant value RAND_MAX is the largest random integer returned by the rand ( ) function and its value is system dependent. To normalize the return value to a value in the range [ LOW, HIGH ], execute: rand ( ) % ( HIGH – LOW + 1 ) + LOW.

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