#include "stdafx.h"#include
     
      /*Initial display-window size*/GLsizei winWidth = 600, winHeight = 500;/*Initialize raster position*/GLint xRaster = 25, yRaster = 150;GLubyte label[36] = { 'J','a','n','F','e','b','M','a','r','A','p','r','M','a','y','J','u','n','J','u','l','A','u','g','S','e','p','O','c','t','N','o','v','D','e','c'};GLint dataValue[12] = { 420,342,324,310,262,185,190,196,217,240,312,438 };void init(void){    glClearColor(1.0, 1.0, 1.0, 1.0);//white display windows.    glMatrixMode(GL_PROJECTION);    gluOrtho2D(0.0, 600.0, 0.0, 500.0);}void lineGraph(void){    GLint month, k;    GLint x = 30;//Initialize x position for chart.    glClear(GL_COLOR_BUFFER_BIT);//Clear display window.    glColor3f(0.0, 0.0, 1.0);//Set line color to blue.    glBegin(GL_LINE_STRIP);//PLot data as a polyline.    for (k = 0; k < 12; k++)        glVertex2i(x + k * 50, dataValue[k]);    glEnd();    glColor3f(1.0, 0.0, 0.0);//Ser marker color to red.    for (k = 0; k < 12; k++) {
   //Plot data as asterisk polymakers.        glRasterPos2i(xRaster + k * 50, dataValue[k] - 4);        glutBitmapCharacter(GLUT_BITMAP_9_BY_15, '*');    }    glColor3f(0.0, 0.0, 0.0);//Ser test color to black.    xRaster = 20;//Display chart labels.    for (month = 0; month < 12; month++) {        glRasterPos2i(xRaster, yRaster);        for (k = 3 * month; k < 3 * month + 3; k++)            glutBitmapCharacter(GLUT_BITMAP_HELVETICA_12, label[k]);        xRaster += 50;    }    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);}void main(int argc, char** argv){    glutInit(&argc, argv);    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);    glutInitWindowPosition(100, 100);    glutInitWindowSize(winWidth, winHeight);    glutCreateWindow("Line Chart Data Plot");    init();    glutDisplayFunc(lineGraph);    glutReshapeFunc(winReshapeFcn);    glutMainLoop();}