Tutorial on C Language Programming Free download

Tutorial on C Language Programming Teodor Rus rus@cs.uiowa.edu The University of Iowa, Department of Computer … Compile the C program in the file mylms.c using the command %cc[Options] mylms.c … Data structures Predefined data types: integer (int), small integers (short), large integers(long) real numbers (float), large real numbers (double) character data (char) User defined data types using type constructors array, record, pointer, file Introduction to System Software-p.3/64 Declarations int xdeclaresxan object of type integer



Record object declaration An object of type TypeNameis obtained by the declaration TypeName MyRecord One can put together the definition and the declaration getting: structTypeName { component1; component2; component3; }MyRecord; …. Reference torecord components MyData.Year, MyData.Month, MyData.Day are references at the components of the data object MyData My PT>Year , My PT>Month , My PT>Day are pointer reference to the same components. Note, we need touse MyPT=&MyDatabeforethis reference make sense; i.e., My PT>Year (My PT) :Year…. Reference to union components The elements of a union are referenced in the same way as elements of a record (struct) are referenced The memory representation of variableuvalwill be large enough to accommodate any of the values that are used in its definition It is the programmer’stasktoprovidea discriminant that will show what component of a union is in the v ariable uvalatagiventime.

Tutorial_on_C_Language_Programming ( 81.0 KiB - 26 hits )