C :: Array Finding Position Of A Value?

Dec 24, 2013

So for a project I'm working on, I'm using an array and generating it's values randomly but unique. Currently I'm working on a 3X3 array and the generated values are in the range from 1-9. So I wrote a function that will tell me the position of the cell whose value is 9. This is the function I wrote:

Code: void Llogaritje1(int t[3][3],int &i, int &j){
int y,l;
for(y=0;y<3;y++){
for(l=0;l<3;l++){
if(t[y][l]==9){
i=y;
j=l;
break;
}
}if(t[y][l]==9) break;
}
}

But it doesn't work on all cells. Seems like at cells t[1][0] and t[2][0] the values that i and j take are 0 0 since when I print them after excecuting the function that's what it returns. I really don't understand why.

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Visual C++ :: Reading Character Symbols On Lines Of Text Position By Position?

Mar 4, 2013

What I have to do is write a small program in C++ to parse the symbols that are used on 5 different lines of text in each position until position 30 is reached on each line. The goal of the parsing program is to interpret the symbols (characters), if there are any per each position, on the 5 lines of text in order to output the actual data that the group of symbols represents.

My question for is this: Is there anything special from a C++ environment that should go in to something like this outside of using standard stuff like the math associated with the search algorithm that has to happen here? The symbols are located in a file, so I know I have to include "iostream" and a few other headers. But outside of header inclusions and the code necessary to iterate and streamline the search and interpretation process, am I missing anything special that I couldn't otherwise find through simple google searches?

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C/C++ :: Take Values From One Array And Searches For Their Index Position In Another Array

Dec 9, 2014

My program takes the values from one array and searches for their index position in another array (linear search algorithm). This is an example of the issue im having(its not part of the actual code below)

a[]={1,2,3,4,5,6}
Arr[]={1,2,2,3,4,5}

If it finds 1 in arr, it returns 0, which is fine but if it finds 2 in arr it return 1 and 1 instead of 1 and 2.

for (int q=0; q=size2;q++) {
int rs=secfunc(array1;size1;array2[q])
if(rs>=0) {
cout<<rs << "";

[Code] .....

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Visual C++ :: Index Position In Array

Dec 9, 2014

My program takes the values from one array and searches for their index position in another array(linear search algorithm). This is an example of the issue I am having(its not part of the actual code below) :

a[]={1,2,3,4,5,6}
Arr[]={1,2,2,3,4,5}

If it finds 1 in arr, it returns 0, which is fine but if it finds 2 in arr it return 1 and 1 instead of 1 and 2. any thoughts on how to fix this?

Code:
for (int q=0; q=size2;q++) {
int rs=secfunc(array1;size1;array2[q])
if(rs>=0) {
cout<<rs << "
";

[Code] .....

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Apr 7, 2013

I want to do this but do not know exactly how to do it:

Create an array of space ship objects and write a program that continually updates their positions until they all go off the screen. Assume that the size of the screen is 1024 pixels by 768 pixels.

I have begun to write a bit code but the problem is when you want to see the space ship moving step for step on the screen I do not know how to create the ship visible so you can see it is moving. Here's my code so far

Code:
#include <iostream>
using namespace std;
struct SpaceShips
{
int x_coordinate;
int y_coordinate;

[Code ......

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Feb 3, 2015

Getting back into programming after a few years off and a bit rusty.

My question is: Is this going to initialize the size of the vector array's position and color properly?

#include <GLFW/glfw3.h>
#include <vector>
class TerrainClass {
private:
struct VertexType {
std::vector<float> position[3];

[Code]...

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C++ ::  2D Arrays - Creating Virtual Creatures By Storing A Letter Into Random Position In Array

Nov 3, 2014

So first I have to display a 2D array with all 0s, which is pretty easy.

#include <iostream>
using namespace std;
int main (){
int array[5][5];
for(int a=0; a<5; a++){
for(int b=0; b<5; b++){
array[a][b] = 0;

[Code] ....

So this displays

0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0

Next, this is where it gets confusing. I have to create a virtual creature by storing a letter into a random position in the array (the array can be up to 20x20 in size). Then make a function that searches the array for creatures, so it would search for that character. When it finds a creature, it should randomly decide to either move the creature to an adjacent position, or have it stay where it is. After, it should ask the user to create a new creature, or quit.

So how would I go about adding & modifying the current code to achieve what is listed above?

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C++ :: Finding A Value In 2D Array?

Jul 9, 2014

I want to search a 2D array to see if it contains a certain value x. I can come up with three different ways to do this. Provided I have:

const int Rows = 40;
const int Columns = 30;
int SampleData[Rows][Columns] = { ... }

Is there any real difference (in terms of performance etc.) between these, or are there an even better solution?

Solution 1:
for(unsigned row = 0; row < Rows; ++row) {
for(unsigned col = 0; col < Columns; ++col) {
if(SampleData[row][col] == x) {
// found
} } }

Solution 2:
int* data = &SampleData[0][0];
if(find(data, data + Rows * Columns, x) != data + Rows * Columns) {
// found
}

Solution 3:
int* data = &SampleData[0][0];
for(unsigned i = 0; i < Rows * Columns; ++i) {
if(*data++ == x) {
// found
} }

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C :: Finding The Minimum Value Of Array

Sep 9, 2013

I am trying to make my program read a bunch of numbers in an array to find its maximum and minimum. the program will ask the user to enter in as much number as possible until they enter a non number/letter. i got my program to find the maximum value but the program couldn't read the minimum value. it always says zero. also everytime i enter the number 0, the program will just finish its loop statement. If i typed in a negative number, it'll read the negative number as its minimum.

Code:
#include <stdio.h>
int main()
{
//-------variables------------------
double list[1000]; // can hold 1000 items
int i;
char letter;
int max = list[0];
int min = list[0];

[Code] ....

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Apr 11, 2014

Most of this program is working correctly, however when I get to the part on lines 70 to 78 to try and use the function on lines 103 to 113 to find out each diagonals value and then print each one back. But when this runs it only returns the value for [0][0] for each run through the loop and I'm not really sure why. I know its probably something simple but I'm just missing it,

Code:
1 #include<stdio.h>
2 #include<stdlib.h>
3 #include<time.h>
4 #define MAX 100
5
6 void display_menu();
7 int check_option(int);

[Code]...

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Mar 20, 2014

I've been trying for over an hour to think of the logic to find the mode of an array.I left out code for initializing the arrays, but all the values in the array are between 0-9. Check out my code below.

Code:

int mode( int array[], int size ) {
int i;
int count;
int max = 0;
int num = 0;
int mode;

[code]....

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Apr 16, 2013

I am attempting to write a program that takes a number(picked by the user) of test scores in an array then calculates the average and outputs the number of passed and failed tests.

On a side note I am attempting to use array notation in the main function and pointer notation in the other functions

#include<iostream>
#include<iomanip>
using namespace std;
int numScores;
int counter = 0;
double *scores;
//Function Prototypes

[Code]...

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Jan 14, 2013

i just want to check to see if one word (string) or one sentance is equal to any others within an array. My code

so basically i want to check if a is equal to either "sleep", "in", or "bed". Or even if the string within a is equal to "sleep in bed" as one string.

I have used the following but even if i get it correct and it says correct it says incorrect another 2 times because it is saying yeah you have gotten one right out of the possible 3. Even if I type "sleep in bed" it still does it (prints out incorrect another 2 times. Also are there any good books to start off with c++?

string a;
string aa[3] = {"sleep", "in", "bed"};
for(int i = 0; i < 3; i++) {
if(a == aa[i]) {
cout << "CORRECT!" << endl;
} else {
cout << "INCORRECT!" << endl;
}
}

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C/C++ :: Finding Element Of Array

Feb 17, 2014

"Write a program in C that finds the element of an array which all the previous are smaller and all the next are bigger than that.If there are more than one print the biggest. If there isn't any print "ERROR" .

EXAMPLE

If the array has 10 elements like this : {2,3,4,6,5,7,8,10,9,8}

The correct answer is 7 , because 2,3,4,6,5 are smaller than 7 and 8,10,9,8 are bigger than 7.

I am working on it for 2 weeks and I can't find a working solution />/>/>

There is the first try :

#include <stdio.h>
#include <stdbool.h>
int s_data[10]={2,3,4,6,5,7,8,10,9,8};
int main() {
int result,i,j,s_len ,tmp1,tmp;
bool GT_PREV,ST_NEXT;

[Code] .....

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Aug 12, 2014

after staring at this for awhile, I can't figure out why it won't work. It prints out numbers from 0 to 100, but will print out an absurdly high number as the highest number, like 790 or 640. I can't see why.

Code:
#include <cstdlib>
#include <ctime>
#include <iostream>
using namespace std;
int find_highest(int array[]);
int find_highest (int array[], int size) {
int highest_num;
for (int i = 1; i < size; ++i) {
if (array[i] > array[i-1]) {

[code]....

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Feb 2, 2014

I'm supposed to find the biggest number (largest value), in any given array A with n numbers. (no floats)

My thoughts here are, check if A[0] > A[1]. if yes, check if A[0] > A[2]. If no, check if A[1] > A[2] etc.

I'm not sure how I can do this in code. I'm thinking if A[0] > A[1] is true, then set A[0] = A[k]. Kind of set it aside, and use that for the next if test. But I'm not sure how to do it.

This is my code so far.

Code:
int main(){
int A[7] = {12, 6, 9, 33, 2, 25, 53};
int i, k;
k = 0;

[Code]....

I'm aware of the flaws here, but this is the best I can do so far. How can I get the if test to use A[k] next, as A[k] will always be the biggest value?

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Feb 3, 2015

How i can find two equal int in array with O(n) time complexityand O(1) place complexity?

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Mar 26, 2013

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Sep 9, 2013

I have to use numbers in my .txt file that are stored in an array. So i have to write a function to find the mode of the numbers in my array.

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Oct 17, 2014

I was assigned to create a program that has a 10 x 8 two dimensional array and fill it with random numbers in the range 50 to 70 inclusively.( Got That part down). The second part is to make function named findSmallest that will find and print, appropriately labeled, the smallest number in the array.

I cant seem to get it working. The code for finding the smallest give me some weird number

Here my Code:

//Assignment 18 Program 2
#include <iostream>
using namespace std;

[Code].....

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Mar 12, 2014

Above you said to find the middle value you should divide the array by two and then display the middle value (aka the median). For example, for an array consisting of 1 2 3 4 5, 3 would be the middle value.

My question is, how/what do I write to tell the program to display the middle value???

So far, I have done enough research and written enough code to receive values from the user and sort the array in ascending order. I simply don't know where to go from here (I started C++ about 1 month ago). I don't know how to tell it to pull the middle value.

I've researched "find_if", "nth_value" and a boat load of others with no luck

Here's what I've done so far:

#include <algorithm>
#include <functional>
#include <array>
#include <iostream>

[Code]....

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Mar 9, 2015

I keep getting an unresolved external symbol error in the double GetHighest function. Ive looked over the code many times and can figure out why its giving me this error.

//Question 1

// Copy source code below and save to a .cpp file (say lab11_01.cpp) and write statements to print what is indicated in the source code.
//In this question, you will implement code for finding the highest value in an array, and you do this in a function.
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#include <iostream>
#include <iostream>
#include <iomanip>
using namespace std;
// Function prototypes
void getTestScores(double[], int);
double getHighest(const double[], int);

[Code] ....

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Oct 12, 2014

I want to find third largest character in ascii as alphanumeritic. The problem is i cannot use arrays. How can I find third largest number ? Have to I compare all chars with each other ?

void third_largest(){
char ch;
do{
scanf("%c",&ch);
}
while(ch!=' ');
}

The chars can be hold up to press space ...

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Aug 26, 2014

With out sorting and if the array size is changed and filled with different elements, mayb some that are all duplicates(in that case display message that says "No nonrepeated digits".

This seemed like a simple task but im failing to grasp some concept. if the array is 2,0,38,2,3,1,3 the first non repeated is 0.
nested loop is how i went. i feel like im going to far with the counters than need be. just need first non repeated. if n equals 2 an o equals 0. and it iterates comparing 0,38,2,3,1,3 to n which is 2. repCount will b 1. if repcount was 0 then n would be the first non repeated number. im trying to consolidate my if else statements so there are not so many. This program fails if the array gets bigger say 2,45,2,7,1,8,9,45,1,10 .....

for (n=0; n<sizeof(digits)/sizeof(int); n++) {
if(repCount<2) {
// nonRepCount=0;
for (o=n+1; o<sizeof(digits)/sizeof(int); o++)

[Code] .....

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Nov 27, 2012

I'm trying to write a program where in you input 9 numbers from 1-10, then it determines the missing number. Here's my code. It has a lot of errors. I want to improve it by setting conditions like no repetition/ 0< number <10.

#include <iostream>
using namespace std;  
int main() {
    int d[]={1,2,3,4,5,6,1,7,9, 10};
    int i=0,j=0,c=0,missing=0;  
for (i = 0; i < 9; i++)

[Code] ....

I'm so new to C++. It always prints out the number 10 even though I typed it already. How to determine the missing one.

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Jan 30, 2013

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