C :: Rounding Of Numbers Using Int Identifier
Apr 23, 2013
I have an assignment for uni which requires the program to ask the user to input a number in for a variable to use in later equations. The assignment specifies that if the number that is input into the program is not an interger that it needs to be rounded UP to the nearest interger. e.g. 2.5 = 3, 5.00001 = 6 etc. i have identified this variable using "int" which i know makes it an interger however it also always rounds the number DOWN to the nearest interger. I was just wondering what the best way to approach this problem was. The only idea i have is to put + 0.99999 at the end of this variable when it is worked out so that if it is not a whole number it will be raised above the next interger and then rounded down however this will not work if there is too many decimal places.
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Jul 18, 2013
I have made a random number generator to create a number between 1000 and 9000, but I always get numbers with many 10s and units. I want to round them 100s.
Is there any way to do this?
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Sep 22, 2013
Write a program that will calculate average of 3 numbers
#include <iostream>
int
main(){
// prototypes:
float add_and_div(float, float,
float);
[Code] .....
i get the following errors:
error C2065: 'cout' : undeclared identifier
error C2065: 'cin' : undeclared identifier
error C2065: 'cout' : undeclared identifier
error C2065: 'endl' : undeclared identifier
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Jan 16, 2014
I want to round to the 2nd digit in a float. Such as 1.85458 to 1.85. How would i go about doing this. I currently keep rounding to the closest integer so the above would round to 2.
Code:
#include <stdio.h>
#include <math.h>
int main(void){
float n;
[Code] ....
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Oct 12, 2013
Why the roundf function is not successfully rounding my numbers.
Code:
#include <stdio.h>
#include <math.h>
//function declarations
void CelToFah (int ctemp, int ftemp);
[Code]....
it produces a correct number when called, but it is not a rounded number, the roundf((float)cel) does nothing. I get the same number with and without it.
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Feb 4, 2014
I'm having trouble with rounding to the nearest cent in this program. It's the only thing that i need. The result i need is just off by one cent. I tried multiplying the interest amount by 100 and adding .5 then dividing all that by 100 but that just made it worse. Here's the code:
Code:
#include <stdio.h>
int main()
{
int count=0;
[Code]....
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Mar 9, 2014
How do I round to the nearest half integer?
Example;
0 to 0.2 = 0
0.3 to 0.5 = 0.5
0.6-0.9 = 1
What's the formula for C++?
I found a way to do it in math but I want to know what I'd have to put in C++. It's (x*2+.5)remove decimal numbers and divide by 2. What do I put in place of "remove decimal"?
For ex; x = 8.4 using (x*2+.5)remove decimal then divide by 2.
8.4 * 2 = 16.8
16.8 + .5 = 17.3
17.3 - decimal = 17
17/2 = 8.5
I want to do something like;
cout << " Half number: << (x*2+.5)remove decimal/2 << endl;
What would I have to put in place of "remove decimal"?
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Oct 4, 2014
Ok so I'm in a programming 1 class working with c++. I have the following assignment:
Write a C++ program that:
asks for and accepts the Percentage earned with as a double (i.e. 75.45)
rounds it to an integer (>= .5 rounds up, <.5 rounds down.)
prints the original Percentage and the corresponding Grade and Points exactly as shown below.
prints an error message for any input that is less than 0 or greater than 100.
For example, if user enters 89.4, the program prints out:
Percentage: 89.4% Grade: B Points: 3.00
You must use an if-else statement to do this in your program.
Use fixed and precision output manipulators (see Ch. 3) to display the values with the exact precision shown above.
IMPORTANT:
Each if statement condition should contain only one comparison! read this again
This means code that is similar to this is NOT okay: if (Percentage >= 80.00 && Percentage <90.00)
This code is not acceptable because the if statement condition above has two comparisons.
(Hint: If you order your if-else chain statements correctly, you will only need one comparison in each.)
I have the program working, but I'm pretty sure I'm not rounding how my professor would like it to. This is my code:
#include <iostream>
#include <cmath>
#include <iomanip>
[Code].....
So my issue here is the rounding, and then theres the converting the double percetnage to an integer. In my next assignment I have to write the program with a switch statement.
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Jul 28, 2012
Rounding a numerical figure up to the nearest hundred. E.G.:
256 >> 300
654 >> 700
15 >> 100
I would like to know the formula to enter into Visual Basic 2008. I'm making a calculator Program, and i need a function that rounds up to the nearest 100...
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Oct 28, 2013
I made this dice simulator which basically throws the dice 1 million times and outputs the frequency and percentage average for each side (1 to 6).
Everything is working fine, except my averages (floats) seem to be rounding up, causing 4% being "unassigned" at the end of the million rolls. I'm outputting with a setprecision of 2, but I only get 0's and no fractional numbers.
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Jul 23, 2013
How would I be able to round a number in multiples of another...
Let's say width is 150
And multiple to be 64...
I want 150 to become 128...
if it was 160 to become 192...
The width number will change and I want to covert it in multiples of the other number example 64... The minimum value will always be the multiple number used...
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Jul 2, 2013
I have an issue with a switch case in my program. I execute it and it does fine all the way up to where it says, "Answer (1, 2, or 3): ". When I enter 1, 2, or 3, it gives me' "Not an input choice!" from the default of the switch case.
NOTE: I use Code::Blocks on Windows XP.
Here is the code:
Code:
#include <stdio.h>
#include <string.h>
int main() {
[Code].....
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Sep 10, 2013
I am working on a couple C++ projectsfor my class. On one of my projects I get this error "identifier not found" for maximumValue. here is the code that I have done. I have got almost all the code from my text book..
// Three numbers.cpp : Defines the entry point for the console application.//
#include "stdafx.h"
#include <iostream>
using namespace std;
int main() {
// demonstrate maximum int value
int int1, int2, int3;
[Code] .....
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Apr 8, 2013
Program is not finished as I can't get passed read_data
Error:
"error C2065: 'fin' : undeclared identifier
error C2228: left of '.open' must have class/struct/union type is ''unknown-type''
#include "stdafx.h"
#include <iostream> // for streams
#include <iomanip> // for setw()
#include <fstream> // for files
#include <cstdlib> // for exit
using namespace std;
void read_data(int A[], int size)
[Code] .....
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Feb 9, 2013
here is my code, the issue is its not determine if the value is a palindrome or not.
// unit 5b.cpp : Defines the entry point for the console application.
//
// How to read a file
// identify the string if its a palindrome or not
//
#include "stdafx.h"
#include <iostream>
#include <cctype>
#include <fstream>
[Code] .....
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Jan 26, 2015
what is the meaning of identifier before function call in this example? i mean that in syntax context
// Create a stack-allocated handle scope.
HandleScope handle_scope(isolate);
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Oct 15, 2014
I keep getting this error message when i try to build the program.
#include <stdio.h>
#include <stdlib.h>
int main () {
int opt;
do {
printf("Please choose an option:
");
printf("1. Calculate resistance value
[code]....
The error messages that i am getting are :
error: expected expression (line20)
error: use of undeclared identifier 'colours' (line 47)
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Jun 4, 2014
I need to keep a data structure, which has an id, an object pointer and a position. this id is used to randomize things, the object and the position is attached to this id. So which way is better?
Code:
struct data {
int id;
ObjectBase* obj;
Vector3 position;
};
vector<data> vecData;
or
map<int, pair<ObjectBase *, Vector3>> mapData;
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Apr 25, 2013
I'm writing a program to read in a Master.txt file and then update it through a Transaction.txt file that contains various transaction types [Adds (A), Deletes (D), and Edits (E1-E4)]. The records in both files are in ascending order based on Item#. Ultimately, the original Master.txt and updated Master file (Master2.txt) will be merged to reflect all valid transactions, and an errorLog.txt file will be created to indicate all invalid transactions. I feel I have all of the code written correctly, but I am still getting errors on my operands and identifiers.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
struct invRecord {
string delDate;
[Code] ....
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Feb 17, 2013
Why "Team" and "NUM_MEMBERS" are undeclared identifiers? I'm not sure I understand why it's giving me errors for those.
//Function Prototypes
void initialize (vector <Team> & tV, const int ID [],
const string m[][NUM_MEMBERS], int arraySize);
void printList (const vector <Team> & tV);
void menu ();
void add (vector <Team> &tV);
int search (const vector <Team> &tV, unsigned int size, int ID);
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Aug 22, 2014
I'm trying to perform a simple input operation, and check to make sure that whatever the user input is a valid input (is within data type bounds, is correct data type...). But when I get to ignoring the input, I keep getting an error.
unsigned short num;
while (true) {
std::cin >> num;
if (std::cin.fail()) {
num = 1;
[Code] ....
I don't fully understand why this error is here.
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Jun 22, 2012
I have got this error: I get the error: Identifier 'deposit' cannot have a type qualifier
I have defined this class
class BankAccount {
private:
double balance;
double interest;
int custNr;
[Code] ....
When I compile the program I get the error: Identifier 'deposit' cannot have a type qualifier ....
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Jan 18, 2012
Would there be anyway for the compiler, or the language, to provide a unique ID during compilation?
I've been using UUID generators, but I've always found the approach of copy pasting from a program to code to be kind of... limiting. If I want a random number, can't the compiler guarantee this for me?
It already does the same thing for anonymous namespaces, so...
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Aug 28, 2012
I've assigned value to variables x and y via cin, but when I try to compile it, I'm getting:
"1>c:users
isedocumentsvisual studio 2010projects ryityourself ryityourself ryityourself.cpp(26): error C2065: 'x' : undeclared identifier
1>c:users
[Code] .....
Code:
#include "stdafx.h"
#include <iostream>
void enterfirst() {
using namespace std;
int x;
[Code] .....
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Mar 6, 2013
I have some code does not compile. I think it's missing an included library, but not sure.
In the int main() block of code, the following three items give errors:
1. Mtrx (the one following "new") - Error: expected a type specifier
2. result - Error: expected a ";"
3. &result - identifier "result" is undefined
Below is the code with the head to show you what has been included:
HTML Code:
#include <iostream>
#include <iomanip>
using namespace std;
#include <limits.h>
// create the structure of the matrix
struct Mtrx {
int numRows;
int numCols;
float array[101][101];
[code]....
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Mar 8, 2013
I'm trying to create a template binary search tree and I'm getting all these vague errors that I have no clue how to solve. I've narrowed it down to my findMax and findMin functions but i can't figure it out any further than that.
template<class T>
class BinarySearchTree{
private:
struct BinaryNode{
T data;
BinaryNode *left;
BinaryNode *right;
[Code] .....
and here is are the errors I'm getting from this header file.
1>------ Build started: Project: Programming Assignment 2, Configuration: Debug Win32 ------
1> main.cpp
: error C2143: syntax error : missing ';' before '*'
: error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
: error C2065: 'T' : undeclared identifier
[Code] ....
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