type mismatch in redeclaration of "copy_string".
expression syntax in function del.
'p1' is assigned a value which is never used
in function del.
parameter 'num' is never used in function del.
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type mismatch in redeclaration of "copy_string". expression syntax in function del. 'p1' is assigned a value which is never used in function del. parameter 'num' is never used in function del.