how can i make a program that will input a number and convert it into a word using array , and also not using string.h library?

how can i make a program that will input a number and convert it into a word using array , and also not using string.h library?

Technically you don't need either arrays or the string.h library to do this, though if you're accepting the word as a string it's easier. So my first question to you is are you taking the "number" as a string or an integer? This will determine how you proceed.