error: expected unqualified-id before '.' token??

[sam23]

Hi all, im new to this programming language and i tried to use my Xcode to build and run this code but i got a error :(, and another error is
i need a help guys

#include <GLUT/glut.h>
#include <stdlib.h>
#include <math.h>

const GLdouble twoPi =6.283185;

class scrPt {
public:
	GLint x, y;
};

GLsizei winWidth = 400, winHeight =300;

void init (void)
{
	glClearColor (1.0,1.0,1.0,1.0);
	
	glMatrixMode (GL_PROJECTION);
	gluOrtho2D (0.0,200.0,0.0,150.0);
}
. >>>>> the error is here (error: expected unqualified-id before '.' token)
.
.// Midpoint routines for displaying a circle

void pieChart (void)
{
	scrPt circCtr, piePt;
	GLint radius = winWidth/4;
	
	GLdouble sliceAngle, previosSliceAngle = 0.0;
	
	GLint k, nSlices = 12;
	GLfloat dataValues[12] = {10.0,7.0,13.0,5.0,13.0,14.0,3.0,16.0,5.0,3.0,17.0,8.0};
	GLfloat dataSum =0.0;
	
	circCtr.x = winWidth/2;
	circCtr.y =winHeight / 2;
	circleMidpoint (circCtr, radius);
	
	for (k =0; k< nSlices; k++)
		dataSum += dataValues[k];
	
	for (k =0; k< nSlices; k++) {
		sliceAngle =twoPi * dataValues[k]/ dataSum + previousSliceAngle;
		piePt.x = circCtr.x + radius *cos (sliceAngle);
		piePt.y = circCtr.y + radius *sin (sliceAngle);
		glBegin (GL_LINES);
		glVertex2i(circCtr.x, circCtr.y);
		glVertex2i(piePt.x, piePt.y);
		glEnd ();
		previousSliceAngle = sliceAngle;
	}
}


void displayFcn (void)
{
	glClear (GL_COLOR_BUFFER_BIT);
	glColor3f (0.0,0.0,1.0);
	pieChart (); >>>>>>>>>>>>>>>>( error: 'pieChart' was not declared in this scope )
	glFlush ();
}
void winReshapeFcn (GLint newWidth, GLint newHeight)
{
	glMatrixMode (GL_PROJECTION);
	glLoadIdentity ();
	gluOrtho2D (0.0, GLdouble (newWidth), 0.0, GLdouble (newHeight));
	
	glClear (GL_COLOR_BUFFER_BIT);
	
	/* Reset diaply-window size parameters. */
	winWidth = newWidth;
	winHeight = newHeight;
	
}

int main (int argc, char** argv)
{
	glutInit (&argc, argv);
	glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
	glutInitWindowPosition (100,100);
	glutInitWindowSize (winWidth,winHeight);
	glutCreateWindow ("Pie Chart");
	
	init();
	glutDisplayFunc (displayFcn);
	glutReshapeFunc (winReshapeFcn);
	
	glutMainLoop ();
	
}

[newb16]

. >>>>> the error is here (error: expected unqualified-id before '.' token)
.
.//

All these three dots (before '>>>', on the next line , and before '//'), are they in the code? Why are they there?

[sam23]

yes they are in the code ... its refer to the Midpoint routines for displaying a circle.

[donbock]

Those periods don't look like legal C syntax. What do you expect them to do?

[sam23]

Midpoint routines for displaying a circle

[Banfa]

Have you tried just removing lines 21,22 and 23 and compiling the code?

[sam23]

Banfa : yes i tried but its end up with error and when i correct the error my output is a pie chart without a circle :)

[donbock]

Midpoint routines for displaying a circle

Your source code snippet consists of

• Include some header files (lines 1-3)
• Define a global variable (line 5)
• Define class scrPt (line 7)
• Define two more global variables (line12)
• Function init (lines 14-20)
• Three periods and a comment (lines 21-23)
• Function pieChart (lines 25-53)
• Function displayFcn (lines 56-62)
• Function winReshapeFcn (lines 63-75)
• Function main (lines 77-end)

Why do you so adamantly believe that the compiler interprets three periods as the instructions for inserting midpoint routines for displaying a circle?

Much more likely is that these periods were meant to be interpreted as an ellipsis in whatever source you cut and pasted this code from. That is, they indicate that a block of code (not needed to make the point) was omitted.

[donbock]

Banfa : yes i tried but its end up with error and when i correct the error my output is a pie chart without a circle :)

At line 38, pieChart calls function circleMidpoint -- passing it the center and radius. You don't have a circleMidpoint function. You will need to write it.

[sam23]

donbock : i really dont understand :(
My lecturer just gave this coding and ask us to try to run it..
I dont have idea how to write fucntion for this circle Midpoint !

[jkmyoung]

I would consult with your lecturer or teaching assistant as to how to write the midpoint function to complete the code. Perhaps this is the conclusion you are supposed to reach.

[sridhard2406]

when you get the code from anybody, better walik through the code, what code is going to do with your system ?. It will help for development/debug knowledge.

[sam23]

Sure sri :)
Nandri :)