using glutBitmapCharacter() to draw text closing opengl program - c++

Question

When I try draw text using a function called drawText() the function runs smoothly but when it reaches glutBitmapCharacter(GLUT_BITMAP_9_BY_15, (int)text[i]); the program unexpectedly closes. I have tested that it is this specific part of the function causing this as if I where to remove it and replace it with printf("Hello World!\n"); the program doesn't crash.
Main function:
int main(void) {
GLFWwindow* window;
int width = 840, height = 640;
if (!glfwInit()) {
printf("failed to init glfw");
return -1;
}
window = glfwCreateWindow(width, height, "ElectroCraft", NULL, NULL);
glfwMakeContextCurrent(window);
if (!window) {
printf("failed to start window");
glfwTerminate();
return -1;
}
glEnable(GL_DEPTH_TEST);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, width, 0, height, 0, 1000);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
while (!glfwWindowShouldClose(window)) {
glClearColor(53.0f / 255.0f, 81.0f / 255.0f, 92.0f / 255.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBegin(GL_LINES);
glVertex2f(0, height-80);
glVertex2f(width, height - 80);
glEnd();
string text;
text = "Hello World!";
//glutBitmapCharacter(GLUT_BITMAP_9_BY_15, int(text[1]));
drawText(text.data(), text.size(), 50, 100);
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
return 1;
}
drawText function:
void drawText(const char* text, int length, int x, int y) {
glMatrixMode(GL_PROJECTION);
double* matrix = new double[16];
glGetDoublev(GL_PROJECTION_MATRIX, matrix);
glLoadIdentity();
glOrtho(0, 800, 0, 600, -5, 5);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glPushMatrix();
glLoadIdentity();
glRasterPos2i(x, y);
for (int i=0; i < length; i++) {
glutBitmapCharacter(GLUT_BITMAP_9_BY_15, (int)text[i]);
printf("Hello world!\n");
}
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glLoadMatrixd(matrix);
glMatrixMode(GL_MODELVIEW);
}
I am not exactly sure if it's my code not being the best or if there's a bug in freeglut library. Just to be clear I'm using freeglut.

Answer 1

If you want to use any function of the GLUT library, then GLUT has to be initialized by glutInit. e.g.:
int main(int argc, char** argv)
{
glutInit(&argc, argv);
// [...]
}