C++ and Order of Operations

[ccb056]

will C++ process this according to the order of operations:

Code: Select all

V=(X+Y)/(1+((X*Y)/(C^2)));

[Tebow2000]

I will just do better memorizing them!

[Smartweb]

yeah, all computer languages follow order of operations.

[ccb056]

so, if I just used v*x-a+b/c it would follow order of operations on any lanyuage rather than execute from left to right?

[Smartweb]

right

[ccb056]

do they also follow the paren () rule?

[Smartweb]

Yes

[ccb056]

do you see anything wrong with this code?

Code: Select all

#include <iostream>
int main ()
{
int C=299792458;
int X=0;
int Y=0;
int V=0;
/*
V=(V1+V2)/(1+((V1*V2)/(C^2)))
*/
while (X<C)
{
V=(X+Y)/(1+((X*Y)/(C^2)));
cout<<V<<"\n";
X++;
cout<<V<<"\n";
Y++;
cout<<V<<"\n";
}
return 0;
}

[Smartweb]

Well, it'll return about a billion lines in the command line; but if that is what you intended, then yes, it will work.

[ccb056]

ok, I rewrote it a little and it wont work, here is what I'm working with

Code: Select all

#include <iostream>
int main ()
{
double C=299792458;
double X=0;
double Y=0;
double V=0;
/*
V=(V1+V2)/(1+((V1*V2)/(C^2)))
*/
while (X<C)
{
cout<<"V1="<<X<<"\n";
cout<<"V="<<(X+X)/(1+((X*X)/(C^2)))<<"\n";
X++;
}
return 0;
}

The compiler (Dev-C++) says this:
line 14 invalid operands `double' and `int' to binary `operator ^'

[Smartweb]

What happens if you change C^2 to C*C

[ccb056]

ha, its works with c*c, bout not c^2

why did it work before with c^2 and not with the new version?

[ccb056]

it's taking a while to finish processing this code:

Code: Select all

#include <iostream>
int main ()
{
double C=299792458;
double X=0;
double Y=0;
double V=0;
/*
V=(V1+V2)/(1+((V1*V2)/(C^2)))
*/
while (X<C)
{
cout<<"V1="<<X<<"\n";
cout<<"V="<<(X+X)/(1+((X*X)/(C*C)))<<"\n";
X++;
}
return 0;
}

what's funny is the two velocities in question (V1 and V2) are the same, eventually, I want to run through all combinations of V1 and V2 in steps of .1c

I need to figure out how to do the step stuff first...

after I have that info, I will migrate into a 3d graph in which I hope to find a 'cone'

I then want to find the volume and area of the cone