[Dev-C++] openGl

[Samuel K. <big...@ya...>]

This is my first OpenGL. I'm using the book OpenGL
Programming Guide which uses C, but I'm using C++. I
tried to compile the following program in Dev. It
brings up hundreds of compiler errors. I believe it is
a left out include file or a missing linker switch.
Sorry if it seems obvious but this is my first try at
OpenGL. Here is the code:

#include <gl/gl.h>
#include <cstdlib>

void display()
{
    glClear(GL_COLOR_BUFFER_BIT);
    
    glColor3f(1.0,1.0,1.0);
    glBegin(GL_POLYGON);
        glVertex3f(0.25, 0.25, 0.0);
        glVertex3f(0.25, 0.25, 0.0);
        glVertex3f(0.25, 0.25, 0.0);
        glVertex3f(0.25, 0.25, 0.0);
    glEnd();
    glFlush();
};

void init()
{
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0.0,1.0, 0.0, 1.0, -1.0, 1.0);
};

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(250, 250);
    glutCreateWindow("hello");
    init();
    glutDisplayFunc(display);
    glutMainLoop();
    return 0;
}

Dev reports the errors in the gl.h. Many of them have
something to do with WINGDIAPI declarations. I do not
know why the cstdlib library is needed. It was in the
example of the book though. I just switched it for c++
because the book had it written for c which was
stdlib.h. Thanks in advance for your help.



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