The Ditty throughout the song is
e--------------------------|
B--------------------------|
G-1-2-4-6-7-6-4-2----------|
D--------------------------|
A--------------------------|
E--------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/p/prince/the_cross_crd.html ]
two chords (forget the names)
(you can figure out the pattern for them)
e----0---------------------|
B----0---------------------|
G----1---------------------|
D----2---------------------|
A----2---------------------|
E----0---------------------|
e--------------------------|
B----2---------------------|
G----2---------------------|
D----2---------------------|
A----0---------------------|
E--------------------------|
Thur you have it. Pretty nice song to start off on.