C :: Function Macro For Finding Square Root Of A Number
Jul 13, 2014How to write a function macro in C for finding the sqrt of a number?
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C++ :: Square Root Of Number
Dec 9, 2013i have written a function that gives me the square root of a number. Yes i know there is already a function in <cmath> that gives square roots but i thought it would be pretty challenging (and therefore fun) to try writing one on my own. I wrote my code while i was in school, listening to my Irish teacher ramble on and on about useless shit, so it's probably not the best possible way of finding the square root of a number.
double msqrt(double x) {
double adder=1;
double y = x;
for(int a=0; ; a++) {
if(y*y > x) y = y/2;
if(y*y <= x) break;
[code]....
C :: Program To Find The Square Root Of A Number
Dec 5, 2013I am writing a program to find the square root of a number. I am using the Newton-Raphson method..Just to clarify a bit of the code.. fabs(1/(x+1)) < 0.001 is to check for relative error..
EXAMPLE: for user entry of 100 if the iteration process ends in 10.055 the answer will return as 10 which is correct. But it isn't doing that.
It compiles I then proceed to run it..prompts me "Enter a number to find the square root of: I type 100 then hit enter...
"The square root of 100 is -1077834936"
My first time writing a program from complete scratch.
And I know there is a sqrt() function...just wanted to write my own.
Code:
#include <stdio.h>
#include <math.h>
double mysqrt(double a);
int main()
{
double a, result;
printf("Enter a number to find the square root of: ");
[Code]...
C++ :: Newton Method Program For The Square Root Of A Number
Mar 1, 2013I have been trying to write a Newton's Method program for the square root of a number and have been failing miserably...
#include <iostream>
#include <cmath>
using namespace std;
int main() {
double x1;
double y;
double x0;
[Code] .....
C :: Prototype Function Square Root Velocity
Mar 30, 2013I am trying to computed the time it takes for a projectile to hit the ground. The problem is that i need to square the input of velocity before i do the calculation. the question I have is that if it's possible to have multiple arguments inside the brackets after main.
#include <stdio.h>
#include <math.h>
double distance (double a, double v, double g);
int square(int y);
double height(double v, double a, double g);
double time (double v, double a, double g);
double sqrt(double num);
[Code] ....
C++ :: How To Find The Square Root For Numerator And Denominator Separately
Apr 1, 2014I having trouble with the rational class
here is my assignment:
Add a square root function to the rational class. Have your program print the square root of any rational number. I want to find the square root for numerator and denominator separatetly. divide the answer to get decimals and convert the decimal to fractions. i got till geting the decimal but i want to convert it back to a simplified fraction
// finding greatest common factor
int gcd(int a, int b)
{
if (b == 0)
return a;
else
return gcd(b, a % b);
}
[Code]...
C :: How To Define Epsilon In Newton Raphson Square Root Program
Mar 6, 2015I'm working on a c program that generates approximations of square roots based on newton raphson method. I worked out the approximations with another method I learnt and I know this program does fine. But I don't get the concept of epsilon. Below is the code for the program
Code:
#include<stdio.h>
// function to compute absolute value
float absoluteValue(float x)
{
if(x < 0)
x = -x;
[code]....
The text I worked this code from uses the epsilon value arbitrarily. how is the epsilon value selected? I tried using this formula to derive the square root of 45. On paper I can go as far as 6.8 something. But once this value is reached it's still bigger than epsilon, so shouldn't the code keep running? The program generates 1.41 for 2, but since it could go further why does the while loop in squareRoot function terminate?
C/C++ :: Check Rational Or Irrational Numbers After Taking Square Root?
Aug 4, 2014I tried to check the rational or irrational numbers after we take the square root. i dont get the formula. for eg. squareroot of 64 is 8 and it is rational. square root of 2 is irrational. how to check it in c++..
View 10 Replies View RelatedC++ :: User Input Two Numbers - Calculate Square Root Then Roots Are Added Up To Return Sum
Aug 23, 2014I have tried writing a code which takes two numbers from the user and calculates their square root then the roots are added up to return the sum. The program is coming out with loads of errors.
#include<iostream>
#include<cmath>
float main(){
using namespace std;
float m1,m2,m3,m4,m5;
[Code] ....
C :: Recursion For Finding Distance Between Root And Leaf?
Jun 19, 2013I wrote the following recursion for finding the distance between a root and a leaf, but am not quite sure how to make it work.
Code:
int calc_depth(Node* tree, Node* zero) {
if (!tree)
return 0;
if (zero->right || zero->left == tree)
return 1;
return (zero->right ? calc_depth(tree, zero->right) : calc_depth(tree, zero->left));
}
C++ :: Finding The Root Of Equation Using Secant Method
Feb 8, 2014I want to find the root of an equation f(x) by using the secant method [URL] .....
#include <math.h>
#include <iostream>
using namespace std;
//Define function f(x)
double f(double x, double a, double b) {
return sin((a*x)/(1+x*x))*atan(b*x)+atan(x);
[Code] ....
1) Do I have to keep the function f and RootFinderSMNew in different cpp files?
2) When compiling I get the following errors:
1>------ Build started: Project: Assignment2.1, Configuration: Debug Win32 ------
1> Find Roots Secant method.cpp
[Code] .....
What am I doing wrong ?
C :: Variadic Macro Function
Sep 12, 2013I'm doing right now is creating a function that callocs (I prefer this to malloc) and returns a string, and it will work similar to printf, I'm calling the function alloCpy(),I have several values that I need in a malloced string, so I call Code: myAllocedString = alloCpy("Value 1 is %s, value 2 is %s, and value 3 is %d", str1, str2, num); To do this I'm using the Variadic Macro, the reason I'm not just using a Variadic Function such as this: Code: char* alloCpy(char *format, ...) {} is because I need to append NULL to the end for the sake of looping through arguments, and I'm understanding it thusfar, but I have a few issues, first of all, I tried defining the Macro in a header file, but when I try to call it I get the error "Undefined reference to alloCpy". Also, to loop through arguments to get string lengths I'm using va_arg(args, char*) which requires all the arguments to be of type char*. Here is my code:
myheader.h:
Code:
#define alloCpy(format, ...) _alloCpy(format, ##__VA_ARGS__, NULL);
char* _alloCpy(char *format, ...); mycfile.c: Code: char* _alloCpy(char *format, ...) {
va_list args;
va_start(args, format);
int args_len = 0;
}
[code]....
So, how can I do this to, first of all, make my macro function accessible from other files importing myheader.h, and second, how can I make it accept any type of argument like printf, so that my example above would work?
C++ :: How To Square And Cube Number In Program
Feb 18, 2014#include <iostream>
#include <conio.h>
#include <iostream>
[Code].....
I can't find a way to square and cube the number I want, which the number will show in the notepad. Is there a way to cube and square a number in my program??
C/C++ :: Displaying Filled Square Next To Hollow Square?
Feb 28, 2015I am able to display a filled and hollow square by themselves, but I can't seem to be able to get them side by side.
So this is my code so far:
[/
#include <iostream>
using namespace std;
int main()
[Code]....
I can get the hollow square to show up, but the first square just shows up as a single line instead of a square. It seems that it ignores the first if statement in the second loop. I've tried not using an if statement in the second loop but it didn't seem to work either.
C++ :: Define A Macro Within A Macro?
Feb 26, 2012Is it possible to define a macro with in a macro? Any trick will do. I am trying to do quick conversion of cuda program to open mp by defining some macros at the top:
Code:
#define __syncthreads() #pragma omp barrier
C/C++ :: 2D Arrays Function - Largest Square?
Mar 25, 2015In this assignment, you are required to write a function called largest square. Your function should take a 2 dimensional array, 2 integers which represent the number of rows and columns in the array, and prints out a 2 X 2 array which represents the largest square in the array. The largest square means the square for which the sum of its elements is the greatest in the array. Submit your function in a file called largestSquare.c
Example: Given the array 1 2 3 4
5 6 7 8
9 10 11 12 the output should be 7 8
11 12
Example 2: Given the array 8 2 6
3 7 3
6 1 1 the output should be 8 2
3 7
The prototype of your function is void largestSquare(int[rows][columns], int rows, int columns).
Am I anywhere close with what I've started?
//
// main.c
// largestsquare
//
#include <stdio.h>
#include <stdlib.h>
int main(int argc, const char * argv[]) {
int rows, columns;
[Code] ...
C++ :: Draw A Square Within A Square Pattern
Oct 25, 2013I know how to draw a square hollow or filled but i need to draw an alternating pattern ....
ex
iPatternHeight = 1
X
iPatternHeight = 3
OOO
OXO
OOO
[Code] .....
C :: Finding The Closest Number To Another Number
Apr 10, 2014Try not to make too much fun of me for my logic, but I'm having trouble with this. I am trying to make it so the program takes a 1 dimensional array and a 2 dimensional array, and checks to see what row in the 2 dimensional array is the closest to the 1D array.
To compute the value of the 1D array you take the first row first element in the 2D array, and the first element in the 1D array, subtract and the absolute value.
Example: | 4 - 3 | = 1;
1Darray = 1.
Full 1 Dimensional Array:
3 1 6 9
Full 2 Dimensional Array:
4 9 1 5
6 1 7 3
0 8 2 6
To compute the value of the first row in the 2D array,
| 4 - 3 | + | 9 - 1 | + | 1 - 6 | + | 5 - 9 | = 18.
| 6 - 3 | + | 1 - 1 | + | 7 - 6 | + | 3 - 9 | = 10.
| 0 - 3 | + | 8 - 1 | + | 2 - 6 | + | 6 - 9 | = 17.
Thus row 1 being the closest row to the 1 dimensional array.
The code I've written so far seems to be going down the right path. Have a look below...
Code:
int i,j,tempRow,tempTotal = 0,firEle,cloRow;
firEle = abs( x[0][0] - y[0] );
for( i = 0; i < size; i++ ) {
tempRow = 0;
for( j = 0; j < size; j++ ) {
tempRow += abs( x[i][j] - y[j] );
[Code] ....
The whole temp part is kind of confusing myself. What I'm thinking is that I can add all row values up using
Code: tempRow += abs( x[i][j] - y[j] ); , then I need to compare that value to see if it is close to the "firEle" which is value I need to get closest to.
C++ :: Finding Max Number
Nov 5, 2013#include <iostream>
using namespace std;
int max(int num1, int num2, int num3);
int main () {
int num1, num2, num3, large;
[Code] ....
For some reason it keeps num3 as large.
C++ :: Finding How Many Factors A Number Have?
Jul 13, 2013What is the most efficient algorithm for finding how many factors a number has? I've just been doing brute force division up to (n - 1) / 2 thus far. How can this be optimized?
View 5 Replies View RelatedC++ :: Finding Nth Number Of A Sequence?
Sep 16, 2013I have to write a program to find the nth number of the Ulam numbers.
It's a bit complicated to explain what an Ulam number is but Wolfram explains it very well here: [URL]
I have to find the nth Ulam number but I don't know what I have to do to get that. My program gives me all the Ulam numbers from a range of 0 to n.
What I want the program to do is tell me that the 49th Ulam number is 243.
/*
C++ Program to find nth Ulam Number
*/
#include <stdio.h>
#include <iostream>
#include <vector>
using namespace std;
int main() {
int num = 0;
vector<int> v;
[code]....
C++ :: Finding If A Number Is Prime Or Not
Oct 3, 2013cin.ignore (10);
return 0;
}
Its not working
C++ :: Finding If A Number Is Prime?
Oct 3, 2013We need it to say if the number is prime or not we need the equation for the if statement or if we have something else wrong to let me know.
#include <iostream>
using namespace std;
int main () {
int number;
bool countr;
for (countr = 0; countr <= 2; countr ++)
[Code] ....
C :: Will Return Root Statement At End Ever Return Value Other Than Value Passed To Function?
Mar 29, 2013I'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]....
C++ :: Finding Highest Number In Array
Aug 12, 2014after 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]....
C :: Finding The Biggest Number In Array?
Feb 2, 2014I'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?