Can you convert the below code into the C$++$ programming language?:

$//$ Create a GLFW window

window $=$ glfwCreateWindow$(800,600,$ "Orthographic vs Perspective", NULL, NULL$)$;

if $(!$window$)\{$

cout $<<$ "Failed to create GLFW window" $<<$ endl;

glfwTerminate$()$;

return $-1$;

$\}$

glfwMakeContextCurrent$($window$)$;

$//$ Set the key callback function

glfwSetKeyCallback$($window$,$ keyCallback$)$;

$//$ Initialize GLEW

if $($glewInit$()!=$ GLEW$\_$OK$)\{$

cout $<<$ "Failed to initialize GLEW" $<<$ endl;

return $-1$;

$\}$

while $(!$glfwWindowShouldClose$($window$))\{$

$//$ Set the projection matrix based on the view mode

glm::mat$4$ projection;

if $($isOrthographic$)\{$

projection $=$ glm::ortho$(-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,0\mathrm{.}1$f$,100\mathrm{.}0$f$)$;

$\}$ else $\{$

projection $=$ glm::perspective$($glm::radians$(45\mathrm{.}0$f$),800\mathrm{.}0$f $/600\mathrm{.}0$f$,0\mathrm{.}1$f$,100\mathrm{.}0$f$)$;

$\}$

$//$ Render your scene with the projection matrix

$//...$

glfwSwapBuffers$($window$)$;

glfwPollEvents$()$;

$\}$

glfwTerminate$()$;

return $0$;

$\}$