C Programming.. Typecasting of structure pointers..

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http://www.unix.com – Hi, I need to pass a typecasted structure pointer of one structure to another structure pointer.. The parameters of both structures are different say if first structure has int, char datatypes and second structure has float, double,char.. Please help.. I need to get the values of one structure and pass them to another structure.. Its pretty confusing me..:eek: (HowTos)