int main()
{
enum Days{Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday};
Days TheDay;
int j = 0;
printf(\"Please enter the day of the week (0 to
enums in C don't really work the way you're expecting them to. You can think of them kind of like glorified constants (with a few additional benefits relating to being a collection of such constants), and the text you've written in for "Sunday" really gets resolved to a number during compilation, the text is ultimately discarded.
In short: to do what you really want you'll need to keep an array of the strings or create a function to map from the enum's value to the text you'd like to print.