C :: How To Check If Return Value Actually Points To Pascal Triangle
Nov 27, 2013
I have been trying for hours to create a specific prototype program that determines a pascal's triangle for a give number of rows. However, prototype must have the return type of int**. I just recently learnt about pointers, why my attempt of the function doesn't work. As well, i am not sure how I can check if my return value actually points to the pascal triangle.
Code:
#include <stdio.h>
#include <stdlib.h>
int **getPascalTriangle(int n)
}
[code]....
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Jan 20, 2015
I have a program that prints out pascal's triangle. One problem: it isn't a triangle. The output doesn't work. This is what it should print:
Code: How many rows: 4
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1 and this is what it does print: Code: Enter a number of rows: 4
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
[Code]....
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Aug 16, 2014
how can i display a pascal triangle in forloop?
Here's my code.
#include<iostream>
using namespace std;
void print(int a[3][3])
[Code].....
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Nov 25, 2013
I need to make a program that returns pascal's triangle of N rows. I actually need to make a function of format "int **func(int n)". I don't know how to go about that, so I am trying this method first, but I seem to be getting an endless loop.
Code:
#include <stdlib.h>#include <stdio.h>
int *rowN(int rowNum, int* prevRow) {
int *rowN;
rowN=realloc(rowN,(rowNum+1)*sizeof(int));
[Code] ....
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Nov 7, 2014
void Pascal(int n){
int i,j;
int a[100], b[100];
a[0]= 1;
[Code] ....
I've been trying to make a function that prints a pascal triangle based on an integer n inputted.
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Nov 27, 2013
I have to write a program to print pascals triangle and stores it in a pointer to a pointer , which I am not entirely sure how to do. I also have to write the file and read it, then create a binary file. Assignment is attached. I am not the best with programming and especially with pointers. I will post my code below.
Code:
#include <stdio.h>
#include <stdlib.h>
void writePascalTriangle(char *fileName, int heightOfTriangle, int **triangle) {
FILE *fp;
fp=fopen("writePascalTriangle.txt", "w");
[Code] ....
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Oct 9, 2014
I'm in need of an algorithm to find the points within a triangle(vertices are known. 3d coordinates). The points are to be at same distance from one another i.e. the points are uniformly distributed within the triangle.
I have done a search about the topic and have come across some ideas like lattice points generation ,tiling polygons with Lattice triangles [URL] .... and taking their centroids as the points.
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Sep 21, 2013
Just wonder is it possible that if the file exist, this function below will fail by returning non-zero value?
_access( INIFilename, 00 )
00 - check for Existence only
I noticed that sometimes if even the file exist, the function will fail or return non-zero value. So trying to find out and duplicate this error. It tends to happen intermittently. How can I find out what causing this error?
Code:
char INIFilename[256]="C: emp est.ini";
unsigned long Error = 0;
if( _access( INIFilename, 00 ) != 0 ) {
Error= GetLastError();
printf ("Failed to access INI file %s (%ul)", INIFilename, Error);
}
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Nov 3, 2014
Example: In a 2-D space, point A=(a1,a2) is bigger than point B=(b1,b2), if a1>b1 and a2>b2.
How do I write a presudo code to find all the maximal points among the given n points?
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Mar 29, 2013
I'm writing some functions pertaining to binary trees. I've used recursion once before while learning quicksort but am still quite new and unfamiliar with it. And this is my first time touching a binary tree. So my question: In my addnode function, will the return root statement at the end ever return a value other than the value passed to the function?
Code:
#include <stdlib.h>
struct tnode
{
int data;
struct tnode * left;
struct tnode * right;
}
[code]....
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Jan 11, 2015
From the page: [URL] ....
#include <iostream>
using namespace std;
int n;
int& test();
[Code] ....
Explanation
In program above, the return type of function test() is int&. Hence this function returns by reference. The return statement is return n; but unlike return by value. This statement doesn't return value of n, instead it returns variable n itself.
Then the variable n is assigned to the left side of code test() = 5; and value of n is displayed.
I don't quite understand the bold sentence. Shouldn't value of n and variable n be the same?
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Apr 19, 2014
i'm working on a robotics project, to move the robot from it's current position to target position i need to calculate the angle first before i can move the robot.this the code I use to calculate the angle:
double cal_angle ( int current_x , int current_y , int tar_x , int tar_y )
{
return atan2(tar_y - current_y, tar_x - current_x);
}
int main ()
[code]....
as u can see the angle between x4,y4 to x1,y1 should be 3.14 (180)however , the result are correct as long as the distance from the current position to target position > 1 (not sure actually).
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Apr 14, 2013
Write a program that creates the output shown in the Output Layout section below. The program should create 2 points with x and y coordinates as integers, prompt the user to input the x and y values for one of the points and randomly set the other (-99 to 99 range) and output the length of the radius line segment and the area of the circle that radius defines. The program should then end. Include an SDM for the program and any other appropriate documentation.
Special Calculations:
Distance between 2 points equation:
√((p0x – p1x)2 + (p0y – p1y)2) (This requires use of the math library)
Output Layout: (bold text represents user input)
Please enter the location of your first point.
Enter a value from -99 to 99 for your x coordinate: -2
Enter a value from -99 to 99 for your y coordinate: 17
The location of your second randomly set point.
Your x coordinate: 45
Your y coordinate: -89
The length of the radius line segment from point one to point two is 115.
The area of the circle with a radius of 115 is 41546.33.
Other:
int pAx;
int pAy;
int pBx;
int pBy;
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Nov 7, 2013
I have 2D points written in {x1, y1, x2, y2, x3, y3, .....}
#include <iostream>
#include <vector>
#include <math.h>
#include <algorithm>
using namespace std;
int main() {
vector<double> vec;
vector<double> vec_ordered;
[Code] .....
Result.
6 4
6 3
6 2
6 1
5 5
5 1
4 4
4 1
3 3
3 1
2 2
2 1
1 1
which wrong result
I wanted to make
6 3
6 2
6 1
5 1
4 1
3 1
2 1
1 1
2 2
3 3
4 4
5 5
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Nov 10, 2013
I am making a game and I am trying to rotate an image so that it is always pointing at the player. I have two lines, the first point of both of them is on the image and the second point of one line is on the last position of the player, and the second point of the other one is on the current position of the player. To rotate the image I need to get the angle between the two lines. how I can get that angle with only the points from the lines?
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May 15, 2014
It ougth to calculate the distance between two point (p1,p2)
"main.cpp"
#include "distancia.h"
void main () {
Point p1,p2;
[code]....
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Jul 23, 2013
This is the source code.
--------------------------------------------------------------------------------
#include <iostream>
#include <windows.h>
using namespace std;
int main(){
[Code]....
When I type a word, it gives me the first letter of the word, then a symbol, or nothing.
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Oct 29, 2014
In the following code I don't understand why am I splitting the y left and y right.
(closest distance between 2 points in 2D)
Am I splitting the y left and y right so that I can concatenate them afterwards and then build the strip,only according to these concatenated halves ?
PS : Finding the min. distance between sorted x right and x left works fine , only problem is with the strip.
#ifndef CLOSESTPAIR_H_
#define CLOSESTPAIR_H_
#include <float.h>
#include <math.h>
typedef struct Point2D {
double x;
double y;
[code].....
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Oct 7, 2013
What the heck is wrong with my logic? I just print a rectangle!!! I have played with thing for ever it seems. I thought the rotating part would be hard but now I find myself stuck.
Code:
#include <istream>
#include "triangle.h"
using namespace std;
void triangle::create_triangle() {
[Code] ....
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Jan 12, 2015
I originally had the user input three different lengths and then used this to determine whether or not it was a right triangle.
if(c==sqrt(a*a+b*b)||a==sqrt(b*b+c*c)||b=sqrt(a*a+b*b))
Now it has to be modified in order to accept the input 2,2 4,4 and 6,8(only an example) and be able to find out if it is a right triangle. I was told that arrays were not necessarily the only way to go about it.
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Oct 25, 2013
I'm implementing a quad tree for an assignment, and I'm not sure if every node should contain a list of pointers to every Point in its sub tree (implying the root node will contain all Points), or if only leaf nodes should contain the Points.
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Oct 16, 2014
Today i am going find out solution of two ellipses intersection points using C programming, I solved using geometry equation substitute method but i am not unable to do same thing in C programming.I am talking example as following two ellipses (x^2)/4+y^2=1 , ((x-2)^2)/4+y^2=1
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Feb 23, 2013
As homework we were assigned to enter the following code to calculate the distance between two points on the x and y plane. The program should ask the user to enter two points then should calculate the distance between two points and print the distance on the screen.
My program will compile correctly but when attempting to run the actual program it doesnt do anything and some how completely skips over my main function...
Code:
#include <stdio.h>
#include <math.h>
struct point {
float x;
float y;
[Code] ....
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Jun 22, 2013
Any class or library that can to calculate the center and radius of a sphere from 4 known points on its surface?
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Mar 5, 2013
I have a program that is trying to find all factors of an integer given. It needs to be done in a recursion function. Right now i have code similar to just getting the prime factors of a integer.
unsigned int * find_factors_using_recursion(unsigned int x ) {
unsigned int * factor = new unsigned int[];//do i put x in here ?
for(unsigned int i = 2; i < x; ++i) {
if(x % i == 0) {
find_factors_using_recursion(x / i);
*factor = (factor[i] = i);
} }
return factor;
delete [] factor;
}
When i cout the *factor = (factor[i] = i) it gives me the prime numbers of the integer passed into the function but when I return the pointer it only returns one of the prime numbers. I'm new to c++, how to return pointers from functions that would be great with an example to go with it.
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Sep 25, 2013
I'm creating a quick program to calculate midpoint and distance between two points. I'm having a little trouble. This is the program:
//This program is a start to solve basic coordinatre plane distances and midpoints
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
using namespace std;
int main(int nNumberofArgs, char* pszArgs[]){
cout << "This is a calculator to find distance and the midpoint between two points. " ;
[Code]...
the problem is that the output for both equations is wrong, it doesn't do the math properly and I assume it has to do with the variable types I'm using but am not sure. P.S. I am using the latest version of DEV-C++
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