C/C++ :: Converting Fractions To Decimals And Vice Versa
Aug 1, 2014
I'm working on a Fraction Class assignment where I'm supposed to provide conversion operators to allow Fraction objects to be used in expressions containing float data values. The way I have it now, I'm getting an error that says operator float(const Fraction &) must contain 'void', which makes no sense to me. Lines 155 - 173.
// Fractions CLASS
// Source: Fraction2012.cpp
// Author: Warren H. Knox, Jr.
// Date: 11/8/2012
#include <iostream>
#include <cstdlib>
using namespace std;
class Fraction {
[Code] ....
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Feb 25, 2014
It is working:
#include <iostream>
#include <string>
#include <vector>
#include <map>
const int ENUM_NOT_FOUND = -1; const std::string NEW = " ";
enum Day {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday};
[code]....
Ouput with GCC 4.8.1:
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Name a day: Friday
day = Friday
But the problem is that whenever I define a new enum, I have to define the << and >> overloads for the new enum again. Isn't there a way to template that as well, so that the << and >> overload needs to be defined just once? My atttempt:
template<typename Enum>
std::ostream& operator << (std::ostream& os, Enum en) {
return os << EnumConversions<Enum>::toString (en);
[Code] .....
fails to compile. I guess the problem is Enum is not known at compile time, even though it should be deducible during run time? Error mentions ambiguous overload for operator>>.
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Nov 13, 2013
I was looking for a C++ library for use as stated in the title. I was considering using Voce; however, for the project, I wanted to be able to use a custom voice. For example, in most TTS programs you can pick voices. I wanted to record a custom one. However, I don't really know how these libraries work internally, and since the text to speech is referred to as synthesis, it seems they are created through algorithms rather than recordings. Is there any library which I could use a custom recorded voice with?
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Feb 23, 2013
I have two form in my project 1st form is FORM1 and 2nd form is FORM2.
FORM1 contain 3 textbox,1 button and FORM2 also contain 3 textbox, 1 button. I want to do....
when user fill FORM1 textboex and click button1 then all entries should be shown on FORM2. and vice versa. I used this code its working very good. when i pass value in form2 textboxes its show on form1 textbox. but i want to do, if textbox of form1 is already fill then form2 textboex should also shws form1 textbox value.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace punchout {
public partial class Form1 : Form
[code]......
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May 26, 2013
how to convert char to string or vice versa,, Also make a program in which we convert a char into string ?
Conversion Char array to String
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May 30, 2013
I need to convert a tsructure name into a string and vice versa. I don't really know how to do that in c.
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Dec 25, 2013
The problem is that I want to write a C++ program that converts an ordinary text file into binary and then reads that binary file and converts it to text file so that this text file equals to first text file. I have wrote this code for it.
int main() {
string name1 = "first", name2 = "sec", name3 = "third";
int j = 0, k = 0;
ifstream ifs(name1.c_str()); // Here I want to read from the ordinary text file (name1).
[Code] .....
Now what the ofs.write(as_bytes(j), sizeof(int)); or ifs.read(as_bytes(k), sizeof(int)); exactly mean?
In practice, the file name1 contains digit 5 and its size is 1 byte. The name2 contains some character/sign like [] and its size is 4 bytes and name3 contains digit 0 and its size is 1 byte, why? I before have created the name1 file in ordinary text file mode.
My machine is Windows 7 32-bit. My compiler is MVS 2012.
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Dec 23, 2013
How to convert an ordinary text file into binary and how to convert that binary file back to a text file so that the first text file equals with the last text file?
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Nov 28, 2012
I transferred data from parent to child. Problem occurred while send data from child to parent dialog.
Find the attachment....
void CChildDlg::OnBnClickedCancel() {
child1ctrl.GetWindowText(parObj.parentval);
::AfxMessageBox(parObj.parentval);
//parObj.parentctrl.SetWindowText(child1val);
[Code] ....
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Mar 13, 2013
Is there any standard USB protocol which i can follow to send data to my embedded board(and vice versa). I have no clue on USB programming using c,is there any example code i could follow,
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Apr 28, 2013
I have written a code but i tried to alter it a little in this manner. But it seemed to not recognise what hexStack.getsize() > 0) is..??
while(hexStack.getSize() > 0)
{
//buffer being a previously declared int
buffer = hexStack.pop();
[Code]....
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Aug 28, 2014
float put;
put = 6/120;
cout << put;
This outputs 0. Why is it so and how can I make it output 6/120 in a more precise way?
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Nov 6, 2014
I am trying to make the code below display the result with decimals. I tried using setprecision, but I am not too sure where to put it. I placed it in cout section where the answer is but it still doesn't come out correctly.
#include <iostream>
using namespace std;
//*Delcare function prototype*
int ConvertToCentimeters (double, double );
//declare exception class*
class NegativeNumber
[Code] ....
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Apr 8, 2013
I have a task to hold a number like 4.0000000000000000199e+30 and, in a variable like long double (the largest of the data type) doesn't hold the whole number, holds only 4.099e+30, like that.
Any way to hold the whole number?
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Apr 24, 2012
i wanted to add 3 decimals places to either string or int.
let say
scenario 1:
a = 8
to
a = 8.000
b = 11.6
to
b= 11.600
c= 34.55
to
c= 34.550
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Dec 12, 2014
i recently started programming. i mean I've been exposed to programming for the first time about a week ago. I've been following the tutorial here and playing around with my own code. For some reason, this code works while receiving decimals but not fractions.
Code:
#include <stdio.h>
int main()
{
float kd;
float kd_2;
printf("Please enter your k/d
");
scanf("%f", &kd );
}
[code]....
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Oct 24, 2013
I need to write a program that can calculate fractions.
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Jul 12, 2012
I have to write a function
struct rNumber add(rNumber a ,rNumber b);
which adds two rational numbers in following representation :
rNumber := s*(n/d)* 2^e
struct rNumber{
_byte_t s; // sign (do not consider for this question)
uint n; //numerator
uint d;// denominator
short e;//exponent
}
If the exponents of both numbers are not equal, then they have to be made equal in order to add them. This can be made in 4 ways : increase or decrease the n or d of both numbers.
But if we decrease the denominator of a number (a.d =1) by shifting it for example 1 bit to the right, we get 0 which leads to INFINITY for the fraction. In another case decreasing the numerator would lead the n to be 0 which meanse the whole fraction is then 0.
According to this, in worst case, all 4 cases has to be checked for the right result.
So far the UNDERFLOW of n or d is considered. If we try to increase the value of n or d, then OVERFLOW may also occur.
The very first, intuitive solution would be iteratively increase/decrease one of the terms and to check if the change leads to ZERO or INFINITY.
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Mar 18, 2014
Ii need an output like this...
#include <iostream>
#include <iomanip>
#include <stdlib.h>
#include <ctype.h>
#include <locale>
using namespace std;
int EquationNum (int Num1, int Den1, int Num2, int Den2);
[Code] ....
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Feb 17, 2013
I'm looking for a library that handles rational, irrational and trascendental numbers and calculates the exact results without approximating values. For example, if I want to calculate:
a = pi;
b = 3;
c = 2;
I want this library to return the result in this way:
sqrt(b*c)*a == sqrt(6)*pi
instead of
sqrt(b*c)*a == 7.6952989
In case it matters, I'm working on Ubuntu and I compile with g++.
I'm pretty sure a library like that exists because it's too useful, I researched it but couldn't find anything.
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Jul 16, 2014
I was trying 2 write a program that would calculate the sum notation of 1/(i^2) with the starting number to be 1 and goes up to the nth term. For instance if the user inputed 3 then the sum would look like 1+1/4+1/9. I somehow made a code but it gets weird numbers which some include negative numbers... when I input a number that is above 5.
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int n;
register int i=1;
float b;//For part 1
[Code] ....
For some reason I can't edit printf("%f",/>/>; when I post it as the topic so ignore that part cuz Ik its supposed to be written as printf("%f",/>;
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Jul 30, 2013
I am making a function that finds the sum of two fractions(fractions are arrays of 2 elements). how would I return an array?
int addFrac(int f1[2], int f2[2]){
int num1 = f1[0]; // numerator of fraction 1
int den1 = f1[1]; // denominator of fractions 1
[Code] ......
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Jul 25, 2013
I'm trying to compare 2 fractions using operator overloading. The program crashes when this is called;
this is definition:
bool operator == (const Fraction& f1, Fraction& f2) {
if (f1==f2)return true;
else return false;
}
this is my calling in the main:
Fraction f1, f2;
cout<<"Enter in the format: 2/4 or 4/9
";
cout << "enter first fraction: ";
f1.Input();
cout << "enter second fraction: ";
f2.Input();
Fraction result:
result = (f1 == f2);//i think problem lies here.
result.Show();
and this is the prototype of the operator:
friend bool operator == (const Fraction& f1, Fraction& f2);
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Feb 15, 2014
I am having a problem with converting a .txt file into a .bin file. It wokrs but only creating a new file and not being able to actually convert it, i have to do this using the fstream functions. I have already created the files in the project file e.g if i type file . file.txt is in the folder.
Here is my Binconvert function -
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
fstream fMyFile;
char Name[256];
char Words[256];
char txtextension[] = ".txt";
char binextension[] = ".bin";
[Code] ....
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Feb 20, 2014
Why is this
Code: fFile << (char) (i)p.x, (char) (i)p.y,(char) (i)p.z); not the same as this
Code: printf("%c%c%c", (i)p.x, (i)p.y, (i)p.z);
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Jan 3, 2013
From my tests I found the problem to be somewhere in the Mantissa part that converts it to binary.
bool xsDLL GetHexFromSF_IEEE754( void* to, Text from, ui08 tSize ) {
from.UpperCase();
int db = 0, dB = 0, dBEnd = tSize, dBLast = ( tSize - 1u ), dbEnd = dBEnd * 8;
ui08 *data = reinterpret_cast< ui08* >( to );
for ( ; dB >= 0; --dB )
data[ dB ] = 0u;
[Code] ....
Adjustments made, still having problems though. After finding a more useful resource [URL] ..... I got the function looking more like it should but am still having problems...
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