Looks legit - the p and cast-to arrays are similar types per "they are both arrays and the array element types are similar" (see cppreference), so not an aliasing violation. Still not nice that most C++ programmers doing a code review would have to look that up before trusting the code.... — Tony Delroy 1 min ago

Srinivasan, See my answer. I've made in a simpler manner which is easy to understand for new programmers. — Suramuthu R 11 secs ago

If you want help doing with your homework, please read: How do I ask and answer homework questions?. If you simply want someone to do your homework for you, read this: Open letter to students with homework problems. (And ... no ... we won't/) — Stephen C 55 secs ago

Welcome to Stack Overflow. This is a reasonable question but it's off-topic as it's seeking software recommendations. FWIW, stcrreg is a Cox model generalised to two states, not a Fine & Gray model. The R survival package can do what you are looking for. I suggest you read the excellent competing risks vignette. The msm and survidm packages can also handle TVCs (though ini multistate CR models not FG) — SamR just now

If you need a software engineer to work for you, hire one. — Turing85 8 secs ago