Untitled

#include<GL/glut.h>
void inti(void){
glClearColor(1.0,1.0,1.0,1.0);
glMatrixMode(GL_PROJECTION);
gluOrtho2D(0.0,200.0,0.0,150.0);
}
void linesegment(void){
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(0.0,0.4,0.2);
glBegin(GL_LINES);
glVertex2i(180,15);
glVertex2i(10,145);
glEnd();
glFlush();
}
void main(int argc,char** argv){
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_RGB);
glutInitWindowPosition(50,100);
glutInitWindowSize(400,400);
glutCreateWindow("line segment");
inti();
glutDisplayFunc(linesegment);
glutMainLoop();
}