C/C++ :: Get Double Random Numbers In Range From 0 To 1?
Apr 19, 2012How to get double random numbers in the range from 0 to 1?
View 2 Replies
ADVERTISEMENT
C++ :: Random Numbers Are Not In Specified Range
Nov 9, 2014My program behaves weird... I wanted to generate 10 random numbers from 1 to 100 each of them bigger than previous, using the while loop and function that returns a random number in specified range.
When I run the program, I get numbers much bigger than 100, even negative number, and numbers are same every time I run the program.
Code:
#include <ctime>#include <cstdlib>
#include <iostream>
using namespace std;
int range(int low, int high);
[Code] .....
C :: GSL And OpenMP - Getting Random Numbers That Are Out Of Expected Range
May 2, 2013I am trying to parallelize some of my code with OpenMP. When I switch to using multiple threads I start getting random numbers that are out of the expected range.
Here is a small example:
Code:
#include <stdio.h>
#include </usr/local/include/gsl/gsl_rng.h>
#include </usr/local/include/gsl/gsl_randist.h>
int main() {
int mySeed=0;
const gsl_rng_type *T;
T = gsl_rng_ranlxs2;
gsl_rng *r_1 ;
[Code] .....
gsl_rng_uniform should only output number in the range [0,1) but with multiple threads it outputs larger number as well.
C :: Loading Array With Random Numbers Within A Range
Oct 5, 2013How would i go about loading an array with random numbers with in a range. For example, loading an array of 500 elements with random numbers in the range of 50-100.
View 9 Replies View RelatedC++ :: Generate Random Numbers Within Specific Range?
Jun 5, 2014So, 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]....
C# :: Generating Unique Random Numbers In The Range
Apr 28, 2014We had to generate random, unique numbers in the range [1,15]. But running the program for several times showed a bug: It wouldn't always generate a new number for every repeated number. I can't figure out the problem, especially since it works half the time and I can't figure out what's making it work some times and not others.
bool flag1 = true, flag2 = true, flag3 = true;
int i, j = 1;
int[] A = new int[11];
Random rnd = new Random();
A[0] = rnd.Next(1, 15);
Console.WriteLine("1. = " + A[0]);
[Code] .....
C/C++ :: Double Comparison For Range Is Not Working Correctly
Mar 17, 2015I am trying to compare a double to be within various ranges, but the comparison is not working correctly. Rounding precision is not a concern, because if the value will match the boundaries so rarely, and it is rounding up to the higher range is acceptable. Below is the doe at issue:
if (kq == 2) {
if (fundt[kq-1][ky-1][2-1] < 450,000,000.00) ktti[ky-1][0] = 1;
else if ((fundt[kq-1][ky-1][2-1] >= 450,000,000.00) && (fundt[kq-1][ky-1][2-1] < 525,000,000.00)) ktti[ky-1][0] = 2;
else if ((fundt[kq-1][ky-1][2-1] >= 525,000,000.00) && (fundt[kq-1][ky-1][2-1] < 650,000,000.00)) ktti[ky-1][0] = 3;
else if ((fundt[kq-1][ky-1][2-1] >= 650,000,000.00) && (fundt[kq-1][ky-1][2-1] < 750,000,000.00)) ktti[ky-1][0] = 4;
else if ((fundt[kq-1][ky-1][2-1] >= 750,000,000.00) && (fundt[kq-1][ky-1][2-1] < 850,000,000.00)) ktti[ky-1][0] = 5;
[Code] ....
I know that a triple-dimension array looks complex, but I can guarantee that is a double. The literal constants I am using should automatically be doubles. The subscript of [2-1] looks odd, but this is code I was given to maintain, and that is how it is written elsewhere, so I kept it for consistency. The problem I am having is that when I run this code, all the data I input is less than the 450 million value, but the run falls through all the if and if-else conditions, and the else code is what is actually executed, i.e., I always get six as my result.
I am running on a Sun Sparc, and the compiler used is SunStudio 12. I have tried using variables, with the values listed above assigned to each variable, but it does work either. When I use variables, if the input value is negative, the comparison for less than 450 million works, but any positive input values will through to the else and give me six.
C/C++ :: Built In Formula For Calculating The Range Of Float And Double?
Oct 26, 2013I want to get the direct formula for calculating the range of double and float datatypes in c,if any.
View 1 Replies View RelatedC++ :: Random Values Between A Range?
Apr 14, 2013i have to find 2 random values between a range, lets say from 0-3 i have to find all the possible combinations between this range like (0,0),(0,1)...etc But, it has to be RANDOM and the same combination cannot repeat it self(obviously).
View 8 Replies View RelatedC++ :: Generate Random Number In The Range -501 To + 50 Inclusive
May 3, 2014Write an instruction to generate a random number in the range -501 to + 50 inclusive.
View 4 Replies View RelatedC++ :: Generate Random Integers In The Range And Store Them In A Vector
Sep 3, 2014You 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.
C++ :: Make 10 Random Numbers Thus Making 10 Random Flips Of Coin?
Aug 31, 2013I want to make 10 random numbers thus making 10 random flips of a coin. I am getting 10 tails or 10 heads!
Code: #include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;
int main(int argc, const char * argv[])
{
[Code].....
C++ :: Prime Numbers In A Given Range
Feb 17, 2013I have an assignment where I have to use two for loops. I need to ask the user for any two numbers and be able to list all the numbers in between and their factors and state whether or not the number is prime or not.
View 2 Replies View RelatedC++ :: Finding A Range Between 2 Numbers?
Sep 23, 2013Ok so I'm reading the Programming: Principles and Practice using C++ and Im stuck in Drill 4 part 5. It says:
Change the program so that it writes out the "numbers are almost equal" after writing out which is the larger and the smaller if the two numbers differ by less than 1.0/10000000
I'm using an If statement for it... I just need know what the formula is to check 2 numbers that were entered by person if they land within the range specified above. so then I can cout << "numbers are almost equal" << endl;
C :: Calculate Prime Numbers In Range And Return Count Of Prime Numbers
Apr 28, 2013I wrote a program which sends a starting and ending range to other processes and the processes calculate the prime numbers in that range and return the count of prime numbers to the head process, process 0. But this is not working properly at the moment. I realize I still have to split up the range based on how many processes I have...I still have not figured out how I want to set that up. I
Code:
#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
int isPrime(int num);
int main(int argc, char **argv){
}
[code]....
C++ :: How To Make Array With A Range Of Numbers From 1 - 9 Only
Jan 29, 2013I want to make an array with a range of number from 1-9 only. So if the user entered more than or less than the number indicated it will be error and ask the user to reinput the data. So far my code can be used to do so that if the user enter the number one by one... But if the user entered all the number in one shot the reentered value will be prompt to the back automatically for some reason...Let say 10,2,3,4 which was suppose to be 1,2,3,4 became 2,3,4,1 instead... here is the code:
#include<stdio.h>
void main() {
int num[4][4];
int row,col,x,y;
for(row=0;row<4;row++)
[Code] .....
C++ :: Find All Prime Numbers In A Range
Oct 17, 2013I am trying to create a program that lists all prime numbers within a range of two number. Why the below program isn't working?
#include <iostream>
using namespace std;
int main(){
int high_range;
int low_range;
int w;
[Code] .....
C/C++ :: Finding Happy Numbers For A Given Range
Oct 5, 2014I'm currently working on an assignment that finds all happy numbers for a given range. Such as 1- 10. My current code just isn't cutting it. I have to use a user defined function and return a bool value to main in order to output if the number is happy or if it sad. For some reason, I cannot get it to loop properly. the first number will be displayed correctly, but the second and third are just squares of the first number, instead of being squared by their single digits. I'm dividing by 10 to get the first number of the digit entered, then I'm using mod to get the remainder. One thing I did notice was that the num2 was putting a remainder of 30 for 130, and I'm not too sure what I need to do to change that, without affecting the whole program.
#include <iostream>
#include <iomanip>
#include <cmath>
#include <cctype>
#include <string>
#include <cstdlib>
using namespace std;
Program calculates the bill for a user
[Code] ....
C :: Determine How Many Numbers In A Range Are Divisible By Third - Loop
Mar 1, 2013I've pretty much finished the entire program, except for the actual calculation part.
"Given a range of values determine how many integers within that range, including the end points, are multiples of a third value entered by the user. The user should be permitted to enter as many of these third values as desired and your output will be the sum of total multiples found."
I've defined functions to take user input for the low range, high range and a do-while loop to take as many third inputs as the user wants (terminated by entering -1, as requested by the question)
To actually calculate if they're divisible, I found out that if A%B = 0, then they are divisible, so I thought I would create a loop where each value in the range between A and B is checked against the third value to see if they output a zero.
What I need to end up with is a program that tells the user how many integers are divisible by the numbers in the range, i.e: "Enter the low range value: 335 Enter the high range value: 475 Enter a value to check within the range: 17 Enter a value to check within the range: -1 There are 8 total values that are divisible by the numbers in the range." Going back to my original question, how would I create a loop or something to "check" how many values are equal to zero, and consequently increment a variable for each instance? (This is how I think it should be done)
Code:
#include <stdio.h>
//GLOBAL DECLARATIONS
int getlowR();
int gethighR(int);
[Code].....
C++ :: How To Randomly Select Uniform Value From Range Of Numbers
Dec 28, 2013How do you randomly select a uniform value from a range of numbers?
View 1 Replies View RelatedC++ :: Find Factors And Primes For A Range Of Numbers
Oct 9, 2014I'm trying to write a program that will find all the factors and primes for a range of numbers. I have the inner loop working but I am having trouble writing the outer loop that will output the range of numbers instead of just finding the factors for one number.
int n1 = 0;
int n2;
int factor = 0;
cout << "Enter a starting number: ";
cin >> n1;
cout << "Enter a ending number: ";
[Code] ....
Visual C++ :: Generating Lottery Numbers In Specified Range
Dec 4, 2012Write a function named generateLotteryNumbers. The function is passed an int array of size 5. The function should generate 5 different lottery numbers in the range 1 to 50 inclusive and place the numbers in the array. The declaration is as follows:
void generateLotteryNumbers (int lotteryNumbers []);
Note that no data is passed in to the function. The array is used to return the function results. Thus the parameter is an OUT parameter. Do not display the result. Return the result.
Do not seed the random number generator inside the function. If you seed the random number generator inside the function and the function is called many times in the same second, your function will return the same results each time it is called.
I know how to generate the numbers in the specified range but I do not know how to test for duplicates. Here is the code I have so far:
Code:
//This program will test the "generateLotteryNumbers" function
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
void generateLotteryNumbers (int lotteryNumbers[]);
[Code] ....
When I try to compile this, my compiler tells me that lines 41 and 46 require an array or pointer type.
C :: Program That Multiply Very Large Numbers (out Of Range Of Long Int)
Jan 10, 2014I have to write a program, that multplicates very large numbers (out of range of long int). It's said that i need to use arrays and read the numbers as strings. My problem is to end function called "mnoz:, because i don't know how to sum the multiplicated values of arrays a and b.
Code:
#include<stdio.h>
#include<math.h>
#include<stdlib.h>
#include "winbgi2.h"
#include<string.h>
#define roz 10000
char lan(char a[])
[Code] ......
C++ :: Read Some Numbers From Input File - Vector Subscript Out Of Range
Nov 3, 2013My project's goal is to read some numbers from input file,then create a grid.my input file is:
2 3
3 4 5
1 2 4
first line is rows and colums. second and third line the grid location values.My code is
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
#include<vector>
using namespace std;
[code].....
C :: Putting Float Numbers Into Double Array
Jan 29, 2014So I have a double array, where I'm inputting float numbers to certain points in an array. Sometimes, the numbers that are printed out are completely different from what I put in.Here is the part of the code:
Code: .
while( token != NULL ) {
num = atof(token);
test[j][i] = num;
printf( "
%s, i is %d, j is %d
", token,i,j );
printf( "number is %f
value test of i,j is %f
[code]....
Why the float num prints out fine, but when put into an array becomes garbage?I'm taking string values from a csv file and turning them into floats, but no problems seem to crop up there.I reset i when appropriate and increment j when needed, so I don't think my problems are from incorrect array values (though they might be)
C++ :: Float And Double Data Types - Cannot Store Infinite Numbers
Sep 6, 2013I was working on float and double data types and to see the results i wrote this program:
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
int main() {
ofstream outputF("output.txt");
double a = 1;
double outcome;
[Code] ....
Well I understand the part it cannot store infinite numbers. but if you take a look at the output for example (since it is too long i just added some of the outputs)
//---------------------
for the value of : 001
1
//---------------------
for the value of : 002
0.5
//---------------------
for the value of : 003
0.3333333333333333148
[Code] ....
if you look carefully at the value "5" and "10" results. it is awkwardly abnormal. which is something i couldnt understand. also it is the same with value "20", "25", "40", "50" and so on.