C/C++ :: Choosing Random Item From Array?

Apr 27, 2015

I need to finish this program which has to ask for seed, then the user gives 5 friends, and then it will choose who to text randomly and show who did not make the cut.

This all i have, I am stuck and I do not know if it correct.

#include <iostream>
#include <string>
using namespace std;
int main() {
string num_friends[5];
int user_input;

[code]....

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C/C++ :: Random Item Selection From Array?

Sep 6, 2014

I need to select a random item from an array but I am going to have more than 1 such array so I created the random value selector as different function. Right now I am getting a correct value for random function but when I try to access the array value associated with that index I get 2 digits which does not make any sense.

#include <iostream>
#include <cmath>
#include <ctime>
using namespace std;
int randFunction(int size);
int main() {
int heapsize;

[code]....

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C++ :: Guess Number Game - Choosing Integer At Random

Jun 11, 2013

Write a program that plays the game of guess the number.the program chooses the number to be guessed by choosing an integer at random in the range 1-1000. The program then types 'i have a number between 1 and 1000,can you guess number? Then the player then types the first guess, the program responds.

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C/C++ :: Rock Paper Scissors - Displaying Output And Choosing Random Option?

Aug 11, 2014

today I've been working on a rock, paper and scissors game. It compiles OK, except:

It doesn't use a random number from 1 -3, or goes out of scope.2. It doesn't COUT and it doesn't flush the buffer.3.

My code is as follows:

#include <windows.h>
#include <iostream>
#include <cstdlib>
#include <ctime>
std::string randomPC(int &);
void PCSelect(int &);

[code]....

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C++ :: How To Search For An Item In The Array

Jun 29, 2014

If the item is in the array. Count how many times it is stored in the array and what are their respective array locations.

How can I add this output in my program.

Here's my code...

int array[15]={28,3,16,4,3,16,5,8,4,12,5,4,8,21,40};
int x=0;
int done=0;
int item;

cout<<"Input an item to be searched:";
cin>>item;

[Code] ....

This should be the output:

Item to be searched: 4
number of occurence : 3
array locations : 3 8 11

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C++ :: Choosing Input Streams

May 23, 2013

So I built an interpreter for a language I made, but I can't get the streams right. I have an istream pointer and if they don't supply a cmd line arg, it references the adress of cin, which works fine. however, if they do supply a file in the form of cmd line args, i want to make it reference an ifstream. how do i do that?

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C++ :: Choosing A Number Between Limits?

Oct 9, 2013

Im trying to choose a # between 1 and 1000 (can be 1 or 1000), error check it, but keep asking until I get the correct input.

#include<iostream>
using namespace std;
int main () {
int num;
bool goodNum;
goodNum = false;
while (!goodNum)

[code]....

This program analyzes a number, determining whether a number is prime or not, perfect or not, and output a list of all divisors for non-prime and perfect numbers.

Enter a number between 1 and 1000 then hit enter: 9000

You entered 9000.

Press any key to continue . . .

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Visual C++ :: Enable / Disable Menu Item 2 In OnUpdate Handler Of Menu Item 1?

Sep 15, 2014

I have two menu items. When item 1 is disabled, I want item 2 to be disabled as well. In the OnUpdate handler of menu item 1, I have tried to use "t_pMenu = pCmdUI->m_pMenu;", "t_pMenu = pCmdUI->m_pSubMenu;" and "t_pMenu = pCmdUI->m_pParentMenu;" but I always get NULL t_pMenu. How can I achieve this purpose?

Code:
void CDummyView::OnUpdateMenuItem1(CCmdUI* pCmdUI)
{
if(m_bShowMenuItem1) {
pCmdUI->Enable(TRUE);

[Code]....

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C :: Picking And Choosing Between User Inputs

Jul 31, 2013

I have recently looked into a self created project where I wanted to compare user input against a list of strings in an external file. That has since been completed to my great satisfaction, however it did throw up some interesting issues in my knowledge and understanding of user input..What is the best way to pick up user input i.e scanf,stdin etc. and when should either be used and can a mixture of types be used, and if so, when and why.

A quick program to take different input methods and display differnt output method (obviously corresponding i.e scanf/printf - fgets/fputs)

My first pothole came when I have setup the method for scanf - fine. Then I setup the method for fgets(test,100,stdin) for example and the fgets method no longer picks up stdin from the user..

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C/C++ :: Array With Random Value?

Jan 7, 2015

i want to create an arry with random value. in 50% times the average of this array is upper of 0.5 and in 50% times the average of this array is lower of 0.5 . i want to write this code in C++. but i dont know what the algorithm is.

My code is this.

#include <algorithm>
#include <cstdlib>
#include <iostream>
int main() {
int a[10] = {0, 1, 2, 3, 4, 5, 6, 7,8 ,9};
std::srand(unsigned(std::time(0)));
}

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C :: Random Number Generator Array?

Apr 6, 2013

Write a program that generates an array of 20 random numbers between 1 and 100. Use a loop to output the numbers on the screen with a field width of 4 characters. Write code that will reverse the numbers in the array and then output the numbers to the screen with a copy of the same output loop used with the original numbers.

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C :: Store Random Numbers In Array

Jan 11, 2015

i cannot print the values stored in the array ?

Code:
#include<stdio.h>
#include<math.h>
#include<time.h>
#include<stdlib.h>
double randf();

[Code] ....

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C :: Generating Random And Different Number In Array

Nov 30, 2014

How to generate random and different number in a range. This is my code:

Code:
#include <stdio.h>#define n 8
#define m 7
int main() {
int i,j,a[n][n];
printf("Relaxed Latin Square (%d,%d)

[Code] .....

When I executed that code, the number is random but not different.

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C :: Storing Random Number Into Array

Dec 16, 2014

Code:

for(int i = 0 ; i < SIZE ; i ++)
{
scanf("%d" , & selection[i]);
srand((unsigned) time(&t));
draw[i] = rand() % 50; //feeling could be a problem with this line of code :::::

}

is it possible to do this. i am trying to get 6 different numbers stored into 6 elements of an array . this is the piece of the code i think there is a problem with. ie my program scans the numbers and then crashes at this point so think it could be something to do with the commented line?

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C++ :: Selecting Random Color From Array

Jul 14, 2014

I have to write a program that selects a random color from an array. I used the srand (time(0)); statement but it still gives me the same color each time. Here is my code.

// Color.cpp
#include <ctime>
#include <iostream>
using namespace std;
#include <string>
#include <cstdlib>
#include "Color.h"

[Code] .....

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C++ :: Random Number Generator With Array

Feb 23, 2015

The program has two array of character. One of them has size 26 and is initialized with the alphabet a to z. A random number generator generates two numbers and these two numbers are used to index into this array of alphabets. The second array is used to hold the indexed alphabets. For example, the first row is the value held in the second array and the second row are the two generated numbers.

b g c z k e <- letter index by generate number n1=1 n2=6 n1=2 n2=25 n1=10 … … … … n2=4 <- generated n1 & n2

Please see illustration below for clarification on the above question.

Element a b c ……… x y z
Index 0 1 2 ……… 23 24 25

Array2
Element a b c ……… x y z
Index 0 1 2 ……… 23 24 25

Final state after program execution

Array1
Element a b c ……… x y z
Index 0 1 2 ……… 23 24 25

Array2*
Element c e m ……… z f g
Index 0 1 2 ……… 23 24 25
Random No generated 2 4 12 ……… 25 5 6

* Actual char element allocated to each index location will depend on corresponding random number generated. Program completes execution after filling all 26 locations in Array2.

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C++ :: How To Pick Random Number From Array

Oct 24, 2013

Basically we have this 7 bit binary code, and i would like to pick out 3 numbers randomly from it, how do we do that ?

for example 1011101

int Num[7];
for(int i=6; i>=0 ; i--)
{Num[i] = binary % 2;
binary = binary/10;}

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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/C++ :: Using Random Number On Array Values

Jun 9, 2014

I'm currently working on a code, its a wheel of fortune type of game. I have specific values of an array of size 10, and i have to get these at a random. so they would not print out in order. but how to assign each value of the random to the array.

#include <stdlib.h>
#include <stdlib.h>
#define CHANCES 5
int main(void){
int num, i;
int money[10] = { 100, 300, 200, 350, 250, 150, 175, 500, 50, 75 };

[Code] ....

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C :: How To Store All Random Generated Numbers In Array

Feb 27, 2013

So we're having an assignment for school where you code a Roulette game which simulates you playing and you can choose how many times you "play" to check how many times you'd win (if that makes any sense, im german :P)

Anyways, the problem is how do i store all the random generated numbers in an array while NOT doing this (it's just a snip):

Code:

void randomzahl(void){
int i;
int zahl5[5];
int zahl10[10];
int zahl100[100];
int zahl1000[1000];
int zahl10000[10000];
if(runden == 5)

[Code]...

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C :: Program That Fills Array With 10 Random Numbers Between 1 And 20

Apr 16, 2013

i have a programming problem and i am unsure of what the final part is.the question is:

Write a program that fills an array with 10 random numbers between 1 and 20, displays the 10 numbers, and finds the sum of the 10 numbers. Call the getData, displayData, and getSum functions from the main function. Output the sum from the main program by calling the getSum function within a printf statement.

i am just really unsure of what this is--getData, displayData, and getSum functions from the main function. Output the sum from the main program by calling the getSum function within a printf statement.what i have got so far is;

Code:

#include <stdio.h>
#include <stdlib.h>
#define ARY_SIZE 10
int main() {
int randomNumbers[ARY_SIZE], sum = 0, i;

[Code]....

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C :: Loading Array With Random Numbers Within A Range

Oct 5, 2013

How 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.

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Visual C++ :: How To Make Random Array To Not Repeat

Feb 17, 2013

Here is my code for a simple game. paste it and try it.

#include <iostream>
#include <string>
#include <ctime>
#include <cstdlib>
using namespace std;
int main (void) {
stringg[4],

[code]...

What they do (enter 4 actions)?

";
for (int ai = 0; ai < 4; ai++)
getline(cin, a[ai]);
cout << "

Where is happening (enter 4 locations)?

";
for (int li = 0; li < 4; li++)
getline(cin, l[li]);
for (int c = 0; c < 4; c++)
cout << g[rand() % 4] << " and " << b[rand() % 4] << " are " << a[rand() % 4] << " from a " << l[rand() % 4] << endl;
return (0);
}

At the end in the 4 lines some of the names, actions and locations repeat. How do I make them to not repeat and use every name that you will enter? do I need random_shuffle? How can I integrate it in my code?

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Visual C++ :: Unique Random Numbers In Array?

Feb 24, 2013

Below is my code for a program that is suppose to generate and display six unique random numbers (between 1 and 54). The issue seems to be in my check for duplicates. I know what I am doing wrong but can't seem to find a way to fix it. I think it is getting stuck in an endless loop because the way I have written it looks like it checks the first value against itself which will of course look like a duplicate everytime.

Code:
#include<iostream>
#include<ctime>
using namespace std;
//function prototype

[Code]....

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C++ :: Make 10 Random Numbers Thus Making 10 Random Flips Of Coin?

Aug 31, 2013

I 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].....

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C :: Fscanf Data To Array - It Always Ends Up With Random Numbers

Apr 16, 2014

I am a very fresh c programme user, and need to fscanf data to arrays. Somehow it just doesn't gets recorded, wonder what is wrong with my code?

When I printf the array it always ends up with random numbers. Below is my programme which is just designed to read a doc and print it back out, as well as the text doc it is designed to read.

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