How does sort function works in algorithm in C++, and how to improve this code? -

-

here homework challenge:

question: write program prom night, in girl can dance taller boy.

what trying do:

  • b no. of boys, g no. of girls
  • stored in vector
  • sort vector

  • compare heights , result like

      boy      girl     can dance? 1 98       90       yes 2 90       91       no 3 85       82       yes 4 78       75       yes 5 70       72       no

what want know:

  • how can improve code.
  • how sort function works? type of sorting uses? can applied on arrays well?

my code:

#include <iostream> #include <vector> #include <algorithm>  using namespace std;  int main() {     int b,g,i,j,h,r,count=0;     vector<int> boys, girls;     //input -no. of boys , girls , heights     cout<<"enter number of boys: ";     cin>>b;     cout<<"enter number of girls: ";     cin>>g;     if(g>b)     {         cout<<endl<<"no! girls can't dance, because no. of boys less'";         exit(1);     }     r=b-g;     cout<<endl<<"start entering height of each boy in centimeter...."<<endl;     for(i=0;i<b;i++)     {         cout<<"height of boy "<<i+1<<" : ";         cin>>h;         boys.push_back(h);     }      cout<<endl<<"start entering height of each girl in centimeter...."<<endl;     for(i=0;i<g;i++)     {         cout<<"height of girl "<<i+1<<" : ";         cin>>h;         girls.push_back(h);     }      //sorting heights of boys , girls     //boy     cout<<endl<<"after sorting boys according height"<<endl;     sort(boys.begin(),boys.end(),greater<int>());     for(i=0;i<b;i++)     {         cout<<"height of boy "<<i+1<<" : "<<boys[i]<<endl;     }     //girl     cout<<endl<<"after sorting girls according height"<<endl;     sort(girls.begin(),girls.end(),greater<int>());     for(i=0;i<g;i++)     {         cout<<"height of girl "<<i+1<<" : "<<girls[i]<<endl;     }      for(i=0;i<g;i++)     {         for(j=0;j<boys.size();j++)         {             if(boys.at(i)<=girls.at(i))             {                 count++;             }         }        }      if(count==0)     {         cout<<endl<<"all girls can dance!\nwhile "<<r<<" boys won't have partner!";     }     else     {         cout<<"all girls can't dance!";     }  return 0; }

it looks issue in line:

for(i=0;i<rem.back();i++)

rem.back() retrieving last element of rem vector, storing indices. see the documentation on vector.back().

what should have on line this:

for(i = 0; < rem.size(); i++)

that should help. don't know if fix problems, that's 1 thing noticed.


Comments

Post a Comment

Popular posts from this blog

mysql - Dreamhost PyCharm Django Python 3 Launching a Site -

-
i'm new python/django , created simple django website using pycharm. site works fine running on computer, i'm lost when comes taking site onto host (dreamhost). i'm able upload files correct directories fine, , believe made correct changes database on mysql. i'm not sure go there though. right now, page shows files rather site. direction appreciated. much! you should not run django application using python manage.py runserver on production. how run application on django depends on server (apache, nginx) want use for apache - https://docs.djangoproject.com/en/1.10/howto/deployment/wsgi/modwsgi/ for nginx - https://www.digitalocean.com/community/tutorials/how-to-serve-django-applications-with-uwsgi-and-nginx-on-ubuntu-14-04 the mysql database should, of course, exist , have correct credentials. or, if choose use sqlite, file should accessible, readable , writable www-user (may different depending on linux distributive)
Read more

java - Sending SMS with SMSLib and Web Services -

-
i have made rest web service send smss using hsdpa usb modem. using smslib in java send smss. every time web service invoked, create gateway start service, send message, stop service , remove gateway. takes 20 seconds each message. found starting service takes lot of time. part of code use send smss service.getinstance().addgateway(gateway); service.getinstance().startservice(); outboundmessage msg = new outboundmessage(phonenumber, message); if (service.getinstance().sendmessage(msg)) { result = "message sent successfully!!"; } else { result = "could not send message."; } service.getinstance().stopservice(); service.getinstance().removegateway(gateway);//remove gateway is there way can start service once if not started , use send message when ever web service invoked? why dont group messages , send in 1 go? service.getinstance().sendmessages(messa...
Read more

java - How to resolve The method toString() in the type Object is not applicable for the arguments (InputStream) -

-
i'm trying read json file local machine. @path("/") public class jsonparsing { file f = new file("file.json"); if (f.exists()){ inputstream = new fileinputstream("file.json"); string jsontxt = ioutils.tostring(is); system.out.println(jsontxt); jsonobject json = new jsonobject(jsontxt); string = json.getstring("1000"); system.out.println(a); } } but i'm getting error in tostring() method. possible read .txt file containing json object local machine? if possible, how done? firstly: whenever ask question- add imports well. secondly: yes possible read .txt file containing json object. steps: 1. add maven dependency in pom.xml - <dependency> <groupid>com.googlecode.json-simple</groupid> <artifactid>json-simple</artifactid> <version>1.1.1</version> </dependency> or add jar of dependency. 2.import...
Read more