arraylit.c: (in function main)
arraylit.c:7:34: String literal with 6 characters is assigned to char [5] (no
                    room for null terminator): "12345"
arraylit.c:13:3: Suspect modification of observer unmodstr[0]:
                    unmodstr[0] = 'U'
   arraylit.c:5:24: Storage unmodstr[0] becomes observer

Finished checking --- 2 code warnings, as expected

arraylit.c: (in function main)
arraylit.c:6:38: String literal with 18 characters is assigned to char [20]
                    (possible waste of storage): "modifiable string"
arraylit.c:7:34: String literal with 6 characters is assigned to char [5] (no
                    room for null terminator): "12345"
arraylit.c:9:34: String literal with 6 characters is assigned to char [7]
                    (possible waste of storage): "12345"
arraylit.c:13:3: Suspect modification of observer unmodstr[0]:
                    unmodstr[0] = 'U'
   arraylit.c:5:24: Storage unmodstr[0] becomes observer

Finished checking --- 4 code warnings, as expected