C/C++ :: Making Octagon Out Of Right Triangles?
Jun 28, 2014
One exercise says that, "Define a right triangle class. Make an octagonal shape out of eight right triangles of different colors."
Making such a class isn't difficult. I wrote it as follows:
#include "Simple_window.h"
class right_triangle : public Shape {
public:
right_triangle(Point p, int l, int sh): c(p), _long(l), _short(sh) {
add(Point (p));}
void draw_lines () const
[code]...
But it sounds that making an octagon using eight right triangles isn't possible!
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Jun 28, 2014
One exercise says that, "Define a right triangle class. Make an octagonal shape out of eight right triangles of different colors."
Making such a class isn't difficult. I wrote it as follows:
#include "Simple_window.h"
class right_triangle : public Shape {
public:
right_triangle(Point p, int l, int sh): c(p), _long(l), _short(sh)
[Code] ....
But it sounds that making an octagon using eight right triangles isn't possible!
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Jun 28, 2014
One exercise says that, "Define a right triangle class. Make an octagonal shape out of eight right triangles of different colors."
Making such a class isn't difficult. I wrote it as follows:
Code:
#include "Simple_window.h"
class right_triangle : public Shape {
public:
[Code]...
But it sounds that making an octagon using eight right triangles isn't possible!
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Oct 15, 2013
i have an assignment where i have to draw a teapot using triangles, and are struggling with the part where i have to color it. Here is an link to the assignment URl....
I have managed to draw the teapot and translated it onto the screen. the part i need support with is making a bounding box for the triangle and coloring it.
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Sep 27, 2014
So in class our teacher assigned us a program where we have to use nested for loops to creates triangles. How does the 2nd for loop print more than 1 star? since the for loop will only run the cout 1 time until it gets to the escape sequence, how does it print more than 1 star on a line? this is what is confusing me. I feel like if i can grasp the understanding of that and what the for loops are doing i can finish the rest of this program with ease
#include<iostream>
using namespace std;
int main()
[Code].....
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Mar 15, 2015
I have to Write a program to produce that makes four triangles and a pyramid. I have to ask the user they height of the triangle and prevent the user from entering a height any larger than 25. It should look like this.
Enter the height of your triangle/pyramid: 3
***
**
*
*
**
***
*
**
***
***
**
*
*
***
*****
im having tourble with 3 and 4th and also pyramid.
HERES WHAT I HAVE SO FAR.
#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
int main () {
int input = 0;
cout << "Please enter the height of your triangle/pyramid: ";
[Code] .....
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Oct 19, 2014
I have to place two asterisk triangles on top of each other BUT only using 3 for statements. I have gotten the first one:
for(int a=1;a<=10;a++) {
for(int b=1;b<=a;b++)
cout << "*";
cout << endl;
}
I need the output to look like this:
*
**
***
****
*****
******
*******
********
*********
**********
*
**
***
****
*****
******
*******
********
*********
**********
The only kicker is I can have a total of 3 nested for loop statements.
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Oct 11, 2014
In C++ by FLTK, to define a circle we use some code like this:
Circle c(Point(x,y), r);
And we can using vector_ref put and save them in a vector, like:
Vector_ref<Circle> vc;
vc.push_back(new Circle(Point(x,y),r));
Ok, those were about Circle and no problem till now!
Triangle can be defined like this for using in codes:
Graph_lib::polyline poly;
poly.add(Point(x1,y1),r1);
poly.add(Point(x2,y2),r2);
poly.add(Point(x3,y3),r3);
and this is a vector to saving them:
Vector_ref<Graph_lib::Polygon> vp;
The problem is that how to save/put triangles/polylines into that vp vector using new keyword like the circle does?
My sig: Save Cobani.
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Apr 6, 2015
How to find triangle in an array of n triangles which has the largest area?
#include <stdio.h>
#include <stdlib.h>
#include<math.h>
typedef struct {
double x,y;
[Code] .....
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Sep 8, 2013
nestedTriangles.cpp description:
The program takes as input a pair of triangles, specified be giving the coordinates of each trangle's vertices. It then determines if either triangle is "nested" within the other, meaning that one triangle lies entirely within the interior of the other.
Pseudocode:
One triangle lies within another if and only if all three vertices of the first triangle lie within the interior of the second triangle.
Suppose that we have a triangle with vertices A, B, and C, described by the coordinates (xA, yA), (xB, yB), and (xC, yC), respectively. The sides of the triangle are the line segments AB, BC, and CA.
A line passing through two points (x1, y1) and (x2, y2) can be considered to be the set of points (x,y) satisfying the equation
f(x,y) = 0
where f(x,y) is given as
f(x,y) = (x - x1) (y2 - y1) - (y - y1) (x2 - x1)
One of the interesting things about that f(x,y) is that we can use it to determine which "side" of the line an abitrary point (x,y) is on:
If f(x,y) = 0, the point is exactly on the line. All points for which f(x,y) > 0 are on one side of the line, and All points for which f(x,y) < 0 are on the other side So the problem of determining whether a point (x,y) is on the inside of a trangle can be checking the sign of f(x,y) for each of the three lines making up the triangle. A complicating factor is that we don't know, for any given triangle, whether those three signs should be all positive, all negative, or some mixture of the two.
The centroid of a triangle can be computed as the "average" of the x and y coordinates of the vertices:
xcen = (xA + xB + xC)/3
ycen = (yA + yB + yC)/3
This point (xcen, ycen) is definitely inside the trangle (unless the triangle is "degenerate" and has no interior points). The problem of determining whether (x,y) is on the inside of a triangle can therefore be resolved by checking to see if it is on the same side of each of the trangle's line segments as (xcen, ycen).
What I need:
I want to fill in the missing bodies for the functions eval and areOnSameSideOf, which manipulate line segments. I think calling eval from within areOnSameSideOf will simplify the implementation of the latter.
Code:
#include <iostream>
using namespace std;
/**
* 2D Cartesian coordinates
*/
[Code]....
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Sep 8, 2013
nestedTriangles.cpp description:
The program takes as input a pair of triangles, specified be giving the coordinates of each trangle's vertices. It then determines if either triangle is "nested" within the other, meaning that one triangle lies entirely within the interior of the other.
Pseudocode:
One triangle lies within another if and only if all three vertices of the first triangle lie within the interior of the second triangle.Suppose that we have a triangle with vertices A, B, and C, described by the coordinates (xA, yA), (xB, yB), and (xC, yC), respectively. The sides of the triangle are the line segments AB, BC, and CA.A line passing through two points (x1, y1) and (x2, y2) can be considered to be the set of points (x,y) satisfying the equation
f(x,y) = 0
where f(x,y) is given as
f(x,y) = (x - x1) (y2 - y1) - (y - y1) (x2 - x1)
One of the interesting things about that f(x,y) is that we can use it to determine which "side" of the line an abitrary point (x,y) is on:
If f(x,y) = 0, the point is exactly on the line.
All points for which f(x,y) > 0 are on one side of the line, and All points for which f(x,y) < 0 are on the other side So the problem of determining whether a point (x,y) is on the inside of a trangle can be checking the sign of f(x,y) for each of the three lines making up the triangle.
A complicating factor is that we don't know, for any given triangle, whether those three signs should be all positive, all negative, or some mixture of the two.
The centroid of a triangle can be computed as the "average" of the x and y coordinates of the vertices:
xcen = (xA + xB + xC)/3
ycen = (yA + yB + yC)/3
This point (xcen, ycen) is definitely inside the trangle (unless the triangle is "degenerate" and has no interior points).
The problem of determining whether (x,y) is on the inside of a triangle can therefore be resolved by checking to see if it is on the same side of each of the trangle's line segments as (xcen, ycen).
I want to fill in the missing bodies for the functions eval and areOnSameSideOf, which manipulate line segments. I think calling eval from within areOnSameSideOf will simplify the implementation of the latter.
Code:
#include <iostream>
using namespace std;
/**
* 2D Cartesian coordinates
*/
struct Point {
double x;
double y;
[code]...
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Feb 27, 2015
Here's my game, what do I need to learn to make a basic GUI? (Easiest way possible for now).
--NOTE, the code was a bit too long for me to post. I can add it if it is necessary. Basically all I want are 4 buttons on the main screen, one that says "Arena," "Store," "Stats," and "Exit."
There will of course be sub menus to each option, but we will get to that later.
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May 28, 2013
I have project that is on c++. it runs fine. i want to use it in my C# application as a dll. i have created its dll and but firing exception of "interprocess communication".
Is this a doable task that creating dll of an exe project and using it in C# application?
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Dec 17, 2013
So I tried to find some youtube videos on how to make a DLL, I found one, I also found several topics (like on msdn and stuff), but I have this code
header
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <Windows.h>
#include <string>
using namespace std;
#pragma comment(lib, "ws2_32.lib")
[Code] ....
And I'm getting these errors:
1>error LNK2001: unresolved external symbol "private: static char * PathSocket::cBuffer" (?cBuffer@PathSocket@@0PADA)
error LNK2001: unresolved external symbol "private: static unsigned int * PathSocket::socket" (?socket@PathSocket@@0PAIA)
error LNK2001: unresolved external symbol "private: static void * PathSocket::hIDTask" (?hIDTask@PathSocket@@0PAXA)
WHY is there static, and what does dllimport/dllexport does? also there are NO tutorials with variables inside dll >.<
I've been following this [URL] ..... and the video I already lost, however there's no
#ifdef MATHFUNCSDLL_EXPORTS
#define MATHFUNCSDLL_API __declspec(dllexport)
#else
#define MATHFUNCSDLL_API __declspec(dllimport)
#endif
in the video, why do we have to use that? [URL] .....
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Nov 13, 2014
I am trying to get this to work without arrays. At the moment all I am trying to do is allow it so that when the user presses 1 the board prints with 1 replaced by X, tell me where am i going wrong. I know its not finished.
#include <stdio.h>
#include <stdbool.h>
char a = '1';
char b = '2';
char c = '3';
[code]....
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Oct 13, 2014
So basically I have to write a C program that, when opening the html file in a browser, looks essentially like this: (Size, position, color of the shapes doesn't matter so long as I have one of each shape and the box surrounding them. Words up top dont matter either.)
This is what I have so far:
Code:
#include <stdio.h>
#include <stdlib.h>
#define FILENAME ("A4P1.html")
[code]....
Anyways i can get the individual shapes, but I don't know how to get all the shapes to appear at once..
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Apr 22, 2014
I have to make a table for 10 Employees to look like this:
Employee ID Gross Pay Net Pay
101 540.58 480.80
158 796.32 630.20
How can I do this? This is my code so far.
#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
void get_emp_rec(int &id, double &prate, double &hours) {
[Code] ....
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May 17, 2013
I'm creating a game in which i.need player to.answer.my question within 10 seconds...
So I need a code for this timer... I don't want code to be paused by sleep or delay functions.. But I need that it waits.for 10 seconds.. and if user types answer in between.. it.reads it
And if player.doesn't answers it within 10 sec.. it displays a message
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Nov 23, 2013
#include<iostream>
#include<fstream>
#include<iomanip>
[Code].....
make it sort ascening wise for salaries and have the occupation sort with it.
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Sep 20, 2014
I wish to create a simple animation, similar to the pong game but completely automatic (i.e. both sides play against eachother sort of like in a screensaver of sorts).
I am clueless on to even start tackling this, what tools to use and how to use them, to make them do what I want. I have had some experience with C++ scripting while modding Fallout 3, but I'm not sure how similar the scripting system available in the SDK for that game, is to the real thing.
Like I was saying I want to create a simple animation where two AI blocks try to prevent a ball from reaching the wall behind them.
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Nov 19, 2014
What my ultimate goal here is to make a program that asks the user how many numbers they would like to add followed by asking the user what numbers they want to add. I want the amount of numbers they can add to be infinite and have the loop continue adding the numbers until it reaches the final number. I just need to know how to do this.
Here's my code:
#include <iostream>
#include <string>
using namespace std;
int main() {
//variables
int amount;
float num;
float sum;
[code]....
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Nov 11, 2014
I'm trying to write a code that proves a queue like fifo (first in first out). I have four characters :
p(rint),e(nqueue),d(equeue) and q(uit).
The problem is when I press d a first character must get rid of, but not. When I press d the numbers get double.
Example input:
e 2 3 9 8 7
p
2 3 9 8 7
d
p
3 9 8 7
d
p
9 8 7
#include <stdio.h>
void enqueue(int queue[], int newnum, int *tail_p, int maxsize);
void deque(int queue[], int *tail_p, int *elem);
void printqueue(int queue[],int count);
[Code] ....
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Jan 16, 2015
Code:
class Robot{
char name[15]; //assign to char n
int x, y , direction;
void ToString(int d);
[Code]......
how do i assign char name[] in the class to char n in the constructor?
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Dec 15, 2013
Code:
#include <stdio.h>
#include <stdlib.h>
#define CLASS 4
#define STUDENT 11
#define GRADE 5
[Code] ....
Giving me that error on 75:10
avesub+=grade[k];
and 90:17
donkeypunch+=grade[j][k];
not sure exactly why
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Mar 6, 2015
I have a problem with making header files in c, i get the code written only in main.c and then i have to create a files with extension .h and extension .c but how to do it.
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Nov 24, 2014
I have a 2D array, array[20][3]. Each row represents a storm and each column represents month #, wind speed, and pressure in that order. This data is read from a file and auto-fills the array. I need to be able to give users the ability to add an additional storm or delete a storm. I know that a linked list would be the best approach but I'm not very familiar with linked lists.
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