c++ - void function Math error - 


#include <iostream>  using namespace std;  void compute_coins(int change, int quarters, int dimes, int nickels, int pennies); void output(int quarters, int dimes, int nickels, int pennies);  int main() {   int change, quarters, dimes, nickels, pennies;   char again = 'y';    cout << "welcome change dispenser!\n";    while(again == 'y'){//creating loop allow user repeat process     cout << "please enter amount of cents have given between 1 , 99\n";     cin >> change;     while((change < 0) || (change >100)){//making loop make sure valid number             inputed         cout << "error: sorry have entered invalid number, please try again:";         cin >> change;     }     cout << change << " cents can given as: " << endl;     compute_coins(change, quarters, dimes, nickels, pennies);     output(quarters, dimes, nickels, pennies);      cout << "would enter more change change dispenser?  y/n\n";//prompts user repeat process     cin >> again;   }   return 0; }   void compute_coins(int change, int quarters, int dimes, int nickels, int pennies) {//calculation find out amount of change given amount inpuied     using namespace std;     quarters = change / 25;     change = change % 25;     dimes = change / 10;     change = change % 10;     nickels = change / 5;     change = change % 5;     pennies = change;     return ; }  void output(int quarters, int dimes, int nickels, int pennies){   using namespace std;   cout << "quarters = " << quarters << endl;   cout << "dimes = " << dimes << endl;   cout << "nickels = " << nickels << endl;   cout << "pennies = " << pennies << endl; }

sorry code didn't transfer , i'm pretty new site still. but, getting crazy numbers outcome on quarters, dimes, nickels, , pennies. did once , worked fine didn't use void functions, had redo , messed myself , i'm stuck. appreciated! 

void compute_coins(int change, int quarters, int dimes, int nickels, int pennies);

this means take in copy of values pass function. hence whatever within function won`t have effect on actual values pass in.

void compute_coins(int &change, int &quarters, int &dimes, int &nickels, int &pennies);

this means give actual variables, not copy. whatever changes on parameters done on variables pass in.

look refences , pointers.


Comments

Post a Comment

Popular posts from this blog

java.util.scanner - How to read and add only numbers to array from a text file -

i'm learning java , have question regarding reading file want read numbers file contains strings well. here example of file: 66.56 "3 java 3-43 5-42 2.1 1 and here coding: public class test { public static void main (string [] args){ if (0 < args.length) { file x = new file(args[0]); try{ scanner in = new scanner( new fileinputstream(x)); arraylist<double> test = new arraylist<>(); while(in.hasnext()){ if(in.hasnextdouble()){ double f=in.nextdouble(); test.add(f);} else {in.next();} } catch(ioexception e) { system.err.println("exception during reading: " + e); } } my problem add 66.56,2.1 , 1 doesn't add 3 after "3 or ignores 3-43 , 5-42 can tell me how skip strings , add doubles here? thanks all said 3 ie; "3, 3-43 , 4-42 strings either u read string , split , check number @ " , - or put in space between characters , integers. jvm after compilation tre...
Read more

rewrite - Trouble with Wordpress multiple custom querystrings -

i'm working on adding multiple querystring , doesn't seem work. i've found codes seems work others might i'm missing something. i want like: http://mydomain.com/board/?getyear=2013&getsometext2=sometext to http://mydomain.com/board/2013/sometext/ i added code below functions.php file. doesn't seem work should though. this works. echoing querystring gets both variable without problem. http://mydomain.com/board/2013/sometext/ but doesn't. tested querystring vis isset() seems nothing being set/get http://mydomain.com/board/2013/ function add_query_vars($vars) { $vars[] = "getyear"; $vars[] = "getsometext2"; return $vars; } add_filter('query_vars', 'add_query_vars'); function add_rewrite_rules($arules) { $anewrules = array('board/([^/]+)/([^/]+)/?$' => 'index.php?pagename=board&getyear=$matches[1]&getsometext2=$matches[2]'); $arules = $a...
Read more