C++ :: Random Number Generation In A Loop
Jan 2, 2014
I've researched this quite a bit and the overwhelming answer I've been seeing for a loop generating the same pseudo-random number is that you're seeing the random number generator inside the loop, but that is not the case with me . . . At least not that I can see.
Basically, as I mentioned, I have a loop "birthing" new bunnies in a loop. And all the new bunnies are being created with the same name and other details.
Here is the code:
void BunnyGraduation::breed() {
for (unsigned int male = 0; male < colony.size(); male++) {
if (colony.at(male).getSex() == Bunny::Sex::MALE && colony.at(male).getRadioactiveMutantVampireBunny() != true && colony.at(male).getAge() >= AGEOFCONSENT) {
for (unsigned int female = 0; female < colony.size(); female++) {
[Code] ....
srand(time(0)); is seeded ONCE in the constructor of the bunny object itself. . . Now, come to think of it, the constructor is called every time an object is created . . . And the constructor contains the srand() . . . and the constructor is being called in a loop. . . So therefore, yes, the srand() is being called inside the loop.
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Apr 13, 2014
I am making a random number generator. I have fixed all issues except for one. I am supposed to ask the user for how many digits the user wants the numbers to have. How many numbers does the user want. Then randomly generate numbers according to what the user entered. So if the user said 2 digits and wanted 4 numbers then it would output 4 random numbers in the range of 10 to 99.
My notes from class show this working correctly. And it does work correctly. But I don't understand the math here or how the modulus effects it. I was able to get 1 and 2 digits to work but once I get to 5 it doesn't generate numbers correctly. it will only generate number s
Code: int min =1;
int max = 9;int number1 = rand();
cout << number1 % max + min << " "; h
Here is the 3 digit code I have. I also need to figure out how to make it unique so no number generates more then once. I think the issue may be that the numbers are not unique and it is generating the same number and that is somehow effecting the numbers it is outputting. It is either that or my math is wrong.
Code:
if (intLength == 5) {
for (int i = 0; i<intQuantity; i++) {
[Code]....
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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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Apr 14, 2013
This is a code I've written for Random Directed Acyclic Graph Generation:
Code:
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <time.h>
using namespace std;
[Code] .....
However this gives two LNK2019 error codes. I'm new to coding... I'd like to learn what I'm doing wrong.
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Nov 15, 2013
I've been working on a program on and off for around a week now and I've been struggling towards the end of the program.First of all, the program is a maths quiz which generates two random numbers per question.I'll give you one part of my code:
Code:
srand ( time(NULL) ); //seeds the random number generator
int score = 0;
int a = rand()%12 +1; //generates a random num between 1-12
int b = rand()%12 +1;
int c = a+b;
int d;
}
[code]....
I've basically copied the above code 10 times and changed the variables by going through the alphabet e.g.
Code:
int a = rand()%12 +1; //generates a random num between 1-12
int b = rand()%12 +1;
int c = a+b;
int d; all the way to
Code:
int an = rand()%12 +1;
int ao = rand()%12 +1;
int ap = rand()%12 +1;
int aq = an+ao-ap;
int ar;
Now what I'm going to do is remove all the declared variables and create a loop. But my problem is; If I wanted to declare four variables for e.g.
Code:
int a = rand()%12 +1;
int b = rand()%12 +1;
int c = rand()%12 +1;
int d = a+b-c;
Would I place the srand( time(NULL)); inside the loop? it's confusing because I know an example of a basic loop with an array would be:
Code:
#include <stdio.h>
#include <conio.h>
int main(void)
{
int test[5]={21,18,47,21,4};
int I;
int total=0;
for (I=0;i<5;i++)
total += test[I];
}
[code]....
how or where to include the random number generator in the loop and to make it ask 10 questions at random.
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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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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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Jan 26, 2014
I am writing for loop with a switch so that scores can be inputted in by a judge. The issue that I am running into is that I will put out an the text then the test happens and the code puts out the switch statement 5 times with random number. Here is what I have written.
Code:
int main() {
int diver;
int option;
int Judge;
cout << "Enter Divers Name:";
[Code] ....
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Sep 26, 2012
I'm running a game online and designing a program to generate Enemy Stats. Basically, it's supposed to generate 25 numbers between 0 and 7(to represent 8 Attributes on a 25 Point Buy system) and count how many times each number shows up.
Here's what the code looks like:
Code:
#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;
int Generate() {
int r= rand();
int s= r%7;
[Code] ....
And here's two outputs.
1: Code:
12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 Stats[0]= 25 Stats[1]= 0 Stats[2]= 0 Stats[3]= 0 Stats[4]= 0 Stats[5]= 0 Stats[6]= 0 Stats[7]= 0 Stats[8]= 0 Disallowed system call: SYS_socketcall
2: Code:
14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 Stats[0]= 0 Stats[1]= 0 Stats[2]= 0 Stats[3]= 0 Stats[4]= 25 Stats[5]= 0 Stats[6]= 0 Stats[7]= 0 Stats[8]= 0 Disallowed system call: SYS_socketcall
Note that the number does change, but only between runs.
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Nov 21, 2013
I am working with C++ in Visual Studio. It's my first semester doing anything like this ever. Still, I am embarrassed that I am having trouble with this simple "coin flipping" program. The user tells the program how many times to "flip the coin" & then the program tells the user the results of each flip. You'll see I am randomly generating a 1 or a 2 within the function coinFlip to represent heads or tails. However, the problem is that if the user wants more than one coin flip, the "random" number stays the same for all of them, resulting in all heads or all tails. I am thinking this is an issue with the for loop that I have within the function coinFlip.
Code:
#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
using namespace std;
[Code] .....
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Oct 26, 2014
#include
#include
#include
int main () {
int gameplays, n, prize, choice1;
[Code]....
So in this code, the user inputs the amount of games he/she wants the program to simulate. For each game, a "prize" is randomly placed in one out of three doors. My problem is that for each game simulated, the prize is always placed in the same door. How do i fix this? I used the stand function but it still doesn't work.
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May 20, 2013
one of my project involves loop inside loops and creating random numbers. Here is what I have so far:#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
[Code]....
so the program will create a random value for the inflow. The idea is that the internal for loop will continue to run until the fill_level of the reservoir, which starts at 0, hits the capacity. The process of simulating how many years (each iteration of the internal for loop representing a year) is to be repeated 10 times by the parent for loop of the water_level simulation for loop.
The problem is that the random number that is supposed to created are the same number. THey are different every time I run it, but they are the same every time the loops repeat to make a new simulation.
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Feb 19, 2014
I am working on a small simple program my program fills up a air plane with customers there is 2 levels 1 and 2 and it will put that person in the spot depending on being picked.
So far i made a boolean airplane with 10 spots I can enter 1 person into the airplane with no problem but then after he sits down i get a infinite loop? I assume i maybe have to use the continue statement I feel like there is something simple that im missing i want to add more people. here is what i have
class Program
{
static void Main(string[] args)
{ bool[] planeSeats = {false, false, false, false, false, false, false, false, false, false };
[Code]......
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Mar 5, 2013
I have program. I need programing one game.
char girl;
char computer;
cout << "Girl choose one of symbol x or o";
so girl choose x.
problem : i need random symbol genetation. so if random symbol are x, than girl start play. if random symbol ar o, than computer start game. who to do this?
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Nov 27, 2013
I'm trying to generate random number from 7 to 10 but all i got is "Error C2661: 'rand' : no overloaded function takes 1 argument"
there is my code:
#include "stdafx.h"
#include <iostream>
#include <cstdlib>
#include <time.h>
using namespace std;
void init_Function(); // init function
[Code] .....
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Nov 11, 2014
When I run this program it always generates the number 41 or 42. Why is this? Even if I add the code
magic = rand()%100 + 1;
to specify a range of 1 to 100 it's still always 41 or 42.
This is exactly the same code my book uses just without the cout << magic statement
#include<iostream>
#include<cstdlib>
using namespace std;
[Code].....
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Mar 27, 2014
When the number is guessed correctly the program doesn't print "You guessed right" ....
Code:
#include"stdafx.h"
#include<iostream>
#include<cstdlib>
#include<ctime>
#include<string>
usingnamespace std;
[Code] ....
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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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May 27, 2014
I have a random number generator that should genetate 2 numbers between 100 and 0. The first number works fine but the second doesn't, why?
i1 = random() %100;
i2 = random() %100;
while(i1 < 0 && i1 > 100){
if (i1 < 0)
i1 = i1 + random() %100;
if (i1 > 100)
[Code] .....
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Sep 6, 2014
I got problem with the loop and Q(remains same = Q1 in output). How to make the random number to be different for x and y???
#include<stdio.h>
#include<time.h>
#include<math.h>
#include<stdlib.h>
int Random();
void Position(int z,int y);
[Code] ....
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Sep 17, 2014
I have a array that has 10 quotes inside, and I want to put a random number between 0 and 9in these -->[] , so that when I press the button a random quote will be shown.
private void Random_Click(object sender, RoutedEventArgs e) {
string[] Quotes = new string[10]; // List with quotes
Quotes[1] = "Life isn't about getting and having, it's about giving and being.";
Quotes[1] = "Whatever the mind of man can conceive and believe, it can achieve.";
Quotes[2] = "Strive not to be a success, but rather to be of value.";
[Code].....
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Oct 12, 2014
I'm making the n puzzle game (15 puzzle), but having a problem generating random numbers without the duplicates.
Random num = new Random();
int rand = num.Next(1, 15);
b.Text = rand.ToString();
eliminating the duplicate numbers and only allowing 1-15 once in each button.
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Nov 3, 2014
I've been having 3 days worth of difficulties with a part of my code for a moving-a-robot-around-blocks problem.
No error messages; it runs, it just, sadly, isn't doing what I want it to do.
When I isolate the random-number generating part of the code, it works just fine and give me numbers 0-7. However, when I put those random numbers into another functions to use them as x and y coordinates in the matrix (in order to randomly position 10 blocks, represented by the number 10), and then go to print the matrix (which should be all zeros except for 10 100s), I get a large random number in each position.
#include <stdio.h>
#include <time.h>
int getXCoordinates() //this function gets random x-coordinates in matrix {
int x;
x=rand()%8; // random number 0-7
[Code] ....
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May 24, 2014
I made a function that provides random number to a matrix. The function works fine but with one problem, every time i call the function it provides the same numbers to every matrix.
void randomMatNumbers(int **p, int rows, int cols) {
int i, j;
srand(time(NULL));
for(i = 0; i < rows; i++) {
for(j = 0; j < cols; j++)
p[i][j] = (rand() % 199) - 99;
}
}
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Apr 11, 2015
I have a code for random numbers between 0 and 90 but i can't figure out how to change the output for numbers to asterisks. Ex. if the random number is 8 i need it to print 8 asterisks.
#include <stdio.h>
#include <time.h>
#define MINR 0
[Code].....
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Aug 13, 2014
So in C#, I'm trying to create a random number between 0 and 70billion. However, Random() doesn't work because the value is Long. I've looked at a bunch of solutions online, but it seemed like they weren't allowing values on the low range. I also saw some bit-shifting stuff, but not sure if thats the best way and I don't quite understand how to do it.
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