473,380 Members | 1,121 Online

# Question about delta?

Hi,
I am a little confused on something.
I am using DevC++.
I am working on a project to make a "dinosaur walk across a map".
I am not sure about the distance formula....i have no clue how to
figure delta.
I had it moving before I changed it to user input.
any help would be greatly appreciated.

I have included all my code

************************************************** ******
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
#include "windows.h"
#include "location.h"
#include "dinosaur.h"
#include "map.h"

int x = static_cast<int>(x);
int y = static_cast<int>(y);

int main()
{
int xx, yy, s;
map M;
location L1, L2;
float D;
int tempi=-1,tempj=10;
dinosaur * bronto=new dinosaur(x, y);

cout << "Please select a starting location for you dino:";
cin >x >y;
cout << endl;

cout << "Please select a starting destination for you dino:";
cin >xx >yy;
cout << endl;

cout << "Please select the speed you want the dino to move:";
cin >s;
cout << endl;

L1.setxy(x,y);
L2.setxy(xx,yy);

D=L2.distance_to(L1);
cout<<D<<endl;

cout<<endl;
D=L1.distance_to(L2);
cout<<D<<endl;
int co = 0;
float xn, yn;
while(co < 20)
{
x=xn;
y=yn;
L1.setxy(x,y);
L2.setxy(xx,yy);
M.movedino(bronto,x,y);
M.display();
yn = y + (yy - y)/D);
xn = x + ((xx - x))/D);
Sleep(2000);
system("cls");
co++;
}
system("pause");
return 0;
}

************************************************** *********************
************
class map
{
public:
map();
void display();
void adddino(dinosaur * d);
void movedino(dinosaur * d, int i, int j);
private:
location * M[10][10];

};
map::map()
{
for(int i=0;i<10; i++)
for(int j=0; j<10; j++)
{M[i][j]=new location;
M[i][j]->setxy(i,j);
}
}

void map::display()
{cout<<endl<<endl<<endl;

for(int i=0;i<10; i++)
{cout<<setw(41)<<setfill('_');
cout<<'\n';
for(int j=0; j<10; j++)
{M[i][j]->display();}
cout<<"|"<<endl;
}
cout<<setw(41)<<setfill('_');
cout<<'\n';
cout<<endl<<endl;
}

void map::adddino(dinosaur * d)
{
int i, j;
char t;
i=d->getx();
j=d->gety();
t=d->gettype();
M[i][j]->settype(t);

}

void map::movedino(dinosaur * d, int i, int j)
{ int iold, jold;
char t;
iold=d->getx();
jold=d->gety();
M[iold][jold]->settype(' ');
t=d->gettype();
d->setxy(i,j);
M[i][j]->settype(t);
}
************************************************** *********************
*************************
class dinosaur
{
public:
dinosaur (int i, int j) {Curr.settype ('D');
Curr.setxy (i,j);}
void setxy(int i, int j){Curr.setxy(i,j);}
char gettype(){Curr.gettype();}
int getx () {Curr.getx();}
int gety () {Curr.gety();}
private:
location Curr;
};
************************************************** *********************
****************************
class location
{
public:
location(){xx=0; yy=0;type=' ';}
void setxy(int x, int y){xx=x; yy=y;}
void settype (char t){type=t;}
char gettype(){return type;}
float distance_to(location l);
double getx (){return xx;}
double gety(){return yy;}
void display();

private:
double xx, yy;
char type;
};
void location::display()
{
cout<<"| "<<type<<" ";

}
float location::distance_to(location l)
{
float D;
D=sqrt( pow(l.getx()-xx,2) + pow(l.gety()-yy,2) );

return D;
}

************************************************** *********************
********

Jan 30 '07 #1
3 2787
b6****@gmail.com wrote:
I am not sure about the distance formula....i have no clue how to
figure delta.
What is your C++ question?

--
Maksim A Polyanin
Jan 31 '07 #2
That was my question....this is for my C++ class that is why I was

Jan 31 '07 #3
On Jan 31, 2:50 pm, b69...@gmail.com wrote:
That was my question....this is for my C++ class that is why I was
1. Try to keep enough from the post you are replying to to keep
context.

2. You've got the wrong newsgroup for such questions, this one is for
question about the C++ language, not it's applications (though where
one ends and the other begins can sometimes be hard to tell). Take a
look in the FAQ* for suggestions where to post your question. And when
you do, you might want to consider to revise you question to better
describe the problem, like what the delta you are looking for is.

* http://www.parashift.com/c++-faq-lit...t.html#faq-5.8

--
Erik Wikström

Jan 31 '07 #4

This thread has been closed and replies have been disabled. Please start a new discussion.

### Similar topics

 5 by: Egor Bolonev | last post by: import os print os.listdir("\\\\delta\\public") outputs and import os print os.listdir("\\\\delta") 1 by: Jimmy Chen | last post by: Recently I've done a db2 backup and restore/recovery, but the process for recovering the database was different than what I thought to be. here is what I did: DB2 is set in online mode -... 3 by: G | last post by: Hi ,you guys: look at the code below //////////////////////////////////////////////////////////////////////////////////////////////// #include using namespace std; int main() { 10 by: JosAH | last post by: Greetings, for the folks who read my 'compilers' article series and the last 'scripting' article: are you interested in quite a nice little project? I pooped up the little language I presented... 1 by: CloudSolutions | last post by: Introduction: For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now... 0 by: ryjfgjl | last post by: In our work, we often need to import Excel data into databases (such as MySQL, SQL Server, Oracle) for data analysis and processing. Usually, we use database tools like Navicat or the Excel import... 0 by: Charles Arthur | last post by: How do i turn on java script on a villaon, callus and itel keypad mobile phone 0 by: aa123db | last post by: Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ... 0 by: ryjfgjl | last post by: If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming... 0 by: ryjfgjl | last post by: In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files... 0 by: BarryA | last post by: What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress... 1 by: nemocccc | last post by: hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions? 1 by: Sonnysonu | last post by: This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...