Sketching curve

[derek1746]

Recently i have an assignment to do,
it is about sketching a curve.
this is my code:

#include <iostream>
using namespace std;
#include "svgforpa1.h"

int main() {
int x1=-100, y1, x2, y2,d,c1,c2,c3,c4 ;
cout<<"Enter the degree of the polynomial"<<endl;
cin>>d>> endl; 
   if (d==3)
   cout<<"For the polynomial f(x)=C1*x^3+C2*x^2+C3*x^1+C4, enter C1, C2, C3, C4 in order:"<<endl;
   else if (d==2)
   cout<<"For the polynomial f(x)=C2*x^2+C3*x^1+C4, enter C2, C3, C4 in order:"<<endl;
   else if (d==1)
   cout<<"For the polynomial f(x)=C3*x^1+C4, enter  C3, C4 in order:"<<endl;
   else
   cout<<"For the polynomial f(x)=C4, enter C4 :"<<endl;
cin>>c1>>c2>>c3>>c4>>endl; 
    svgout<<"line"<<0<<1000000<<200<<1000000<<"1 green";
    svgout<<"line"<<100<<0<<100<<2000000<<"1 green";
    while (x1<100)
    {x2=x1+1;
    y1=c1*x1*x1*x1+c2*x1*x1+c3*x1+c4;
    y2=c1*x2*x2*x2+c2*x2*x2+c3*x2+c4;
    svgout << "line" << x1+100 << y1 << x2+100 << y2 << "1 blue";
    x1=x1+1;
    }



	return 0;
}

However, the complier said that i get "no match for operator in "for line 8&17
What is the problem here?
thx a lot!

[hamsterman]

cin >> endl?
That's not right. How do you expect that to work?

[derek1746]

o thx.

[derek1746]

i try to correct that as cin>>d;
but the problem still remains.

[Athar]

You need to fix it in line 17 as well...

[derek1746]

actually i fixed both lines..
but the problem still remains..

[Athar]

Doubtful.
Post the new source and copy & paste the exact error message(s).

[derek1746]

oh, now the problem has fixed
but the output is not correct
it seems it is the logic problem now..
code:

#include <iostream>
using namespace std;
#include "svgforpa1.h"

int main() {
	int x1=-100, y1, x2, y2,d,c1,c2,c3,c4 ;
	cout<<"Enter the degree of the polynomial"<<endl;
	cin>>d;
	if (d==3)
	cout<<"For the polynomial f(x)=C1*x^3+C2*x^2+C3*x^1+C4, enter C1, C2, C3, C4 in order:"<<endl;
	else if (d==2)
	cout<<"For the polynomial f(x)=C2*x^2+C3*x^1+C4, enter C2, C3, C4 in order:"<<endl;
	else if (d==1)
	cout<<"For the polynomial f(x)=C3*x^1+C4, enter  C3, C4 in order:"<<endl;
	else
	cout<<"For the polynomial f(x)=C4, enter C4 :"<<endl;
	cin>>c1>>c2>>c3>>c4;
    svgout<<"line"<<0<<1000000<<200<<1000000<<"1 green";
    svgout<<"line"<<100<<0<<100<<2000000<<"1 green";
    while (x1<100)
    {x2=x1+1;
    y1=c1*x1*x1*x1+c2*x1*x1+c3*x1+c4;
    y2=c1*x2*x2*x2+c2*x2*x2+c3*x2+c4;
    svgout << "line" << x1+100 << 1000000-y1 << x2+100 << 1000000-y2 << "1 blue";
    x1=x1+1;
    }



	return 0;
}

[Athar]

Then you need to tell exactly what about the output is not correct and what you expected.
Also, you should post svgforpa1.h.

[derek1746]

ya, that is the problem..
school has given us a grading program to check
also i can't see the output of the graph
by using IE

svgforpa1.h is too large

[LB]

If you right click the top part of the console window, and choose "Edit -> Select All" then "Edit -> Copy", you can paste it in here.