syntax problems.

[jendrin]

Hello i can't find the error on my program..and i dont know how to end it either.

#include<iostream>
#include<iomanip>
#include<iomanip>
#include<cmath>
#include<string>
using namespace std;
 
void falsi(double& fd, double& fu, double& fr, double d, double u, double r)
{
   fd=sin(d)+cos(1+d*d)-1;
   fu=sin(u)+cos(1+u*u)-1;
   r=((u*fd - d*fu) / (fd - fu));
   fr=sin(r)+cos(1+r*r)-1;
}
 
void eq(double x, double y)
{
   int i;
   double fd,fu,fr,u,d,r;
   x*=1;
   y*=1;
   cout<<"The value of Xd=1 and Xu=2\n";
   for (i=4;i<5;i++)
   {
      falsi(fd,fu,fr,d,u,r); 
      if (fr > 0 && fd > 0)
      {
         r = d;
      }
      else
      {
         r = u;
      }
 
int main()
{
   char z;
   cout<<"choose letter a, b, or c";
   cin>>z;   
   if (z=='a')
   {
      eq(1,2);
   }
   else if (z=='b')
   {
      eq(1,2.5);
   }
   else
   {
      eq(1,1.5);
   }

[sanctus]

Hello i can't find the error on my program..and i dont know how to end it either.
#include<iostream>
#include<iomanip>
#include<iomanip>
#include<cmath>
#include<string>
using namespace std;




void falsi(double& fd, double& fu, double& fr, double d, double u, double r)
{
fd=sin(d)+cos(1+d*d)-1;
fu=sin(u)+cos(1+u*u)-1;
r=((u*fd - d*fu) / (fd - fu));
fr=sin(r)+cos(1+r*r)-1;
}

void eq(double x, double y)
{
int i;
double fd,fu,fr,u,d,r;
x*=1;
y*=1;
cout<<"The value of Xd=1 and Xu=2\n";
for (i=4;i<5;i++)
{
falsi(fd,fu,fr,d,u,r);
if (fr > 0 && fd > 0)
{
r = d;
}
else
{
r = u;
}

int main()
{

char z;
cout<<"choose letter a, b, or c";
cin>>z;
if (z=='a')
{
eq(1,2);
}
else if (z=='b')
{
eq(1,2.5);
}
else
{
eq(1,1.5);
}

I don't understand why you define in falsi fd and others to be a reference to a double, but then use them in the same way a the normal doubles d, u, r.
Also what is the sense of x*=1 and y*=1? You don't change anything...

[gpraghuram]

Hello i can't find the error on my program..and i dont know how to end it either.
#include<iostream>
#include<iomanip>
#include<iomanip>
#include<cmath>
#include<string>
using namespace std;




void falsi(double& fd, double& fu, double& fr, double d, double u, double r)
{
fd=sin(d)+cos(1+d*d)-1;
fu=sin(u)+cos(1+u*u)-1;
r=((u*fd - d*fu) / (fd - fu));
fr=sin(r)+cos(1+r*r)-1;
}

void eq(double x, double y)
{
int i;
double fd,fu,fr,u,d,r;
x*=1;
y*=1;
cout<<"The value of Xd=1 and Xu=2\n";
for (i=4;i<5;i++)
{
falsi(fd,fu,fr,d,u,r);
if (fr > 0 && fd > 0)
{
r = d;
}
else
{
r = u;
}

int main()
{

char z;
cout<<"choose letter a, b, or c";
cin>>z;
if (z=='a')
{
eq(1,2);
}
else if (z=='b')
{
eq(1,2.5);
}
else
{
eq(1,1.5);
}

HI,
please post the code with code tags which will be easier for us to read/understand the code.
You have couple of } missed.
Try to use a editor like notepad++ which helps u in finding this.

Raghuram

[jendrin]

What do you suggest i do?this is btw false position method for approximating a root.

[Ganon11]

The only syntax errors I noted were that you never finished the eq() function - there are a few }'s missing - and you also didn't finish the main() function in the same manner.