I am trying to come up with a program that converts a number
say:-

1359 and the program turns it into £13.59.

I know of the atoi function that converts a string into a number
but i want to do the opposite so that i can convert

int num=1359;
int numArray[]=function(num);

so that numArray[0] =1
numArray[1]=3
numArray[2]=5
numArray[3]=9

does such a function exist or am i approaching the problem all
wrong here?

Any help appreciated!