15 replies to this topic

[NicholasIT]

void tanFunc(double inputX)

{


	double value=inputX;

	double result;

	double sinx,cosx;

	sinx=sinxFunc(value);

	cosx=cosFunc(value);

	result=sinx/cosx;


	inputX=result;

	cout<<result<<endl;

	

	

}

im trying to get my sin function value and cos function value ,in case to calculate my tanx,however,it come out wf error cannot convert . error C2296: '%' : illegal, left operand has type 'double'
can anyone give some clues how to modify it ?

[zoranh]

Do you have a function named sinx? Try renaming variable sinx into something else (less meaningful, e.g. double somethingElse). This error may indicate that in sinx/cosx expression compiler has concluded that sinx is a function or something like that, rather than double.

[NicholasIT]

ya,i got a function name sinxFunc(inputX)
i put it as result,however ,it give me the same result :S

[simislovas]

show me your sinxFunc() code, then maybe i'll help.

[Flying Dutchman]

Quote

error C2296: '%' : illegal, left operand has type 'double'

You can not use modulus operator with double or float as far as I know. Perhaps you could try this: fmod in math.h

[NicholasIT]

hmmm,but i dint use modulus in my program @@''
however,i plan to do and i did it,somehow,it come out wf tht error oso @@''

[simislovas]

NicholasIT
post sinxFunc code, its harrd to say what is wrong.
now i'm curious.

[NicholasIT]

hmm,here is my

void sinxFunc(double inputX)
{
//calculation,my result is return to inputX,while my inputX is the value that i put..
}

[zoranh]

What is the exact line on which compile error occurs?

[NicholasIT]

void tanFunc(double inputX)
{

	double value=inputX;
	double result;
	double sinx,cosx;
	sinx=sinxFunc(value); // here is my compile error
	cosx=cosFunc(value); // here also
	result=sinx/cosx;

	inputX=result;
	cout<<result<<endl;
	
	
}

hmm,my error is (208): error C2440: '=' : cannot convert from 'void' to 'double'

[simislovas]

hmm, but with void function you are not getting the value, unless you are sending address and changing its data. but it's not as i can sea form declaration.
Maybe you'll want to do liak this:

double sinxFunc(double inputX)

{

	double result;

	//calculation

	return result;

}

[NicholasIT]

hmm?in case,i need to change my form to double ?