With advancement in learning to program one encounters many new concepts, remember to all this new concepts were designed to solve complexity of programming. One such concept is of enumeration data type in C. Read further to know about it.
An enumeration is a list of constant integer values, as in
enum boolean { NO, YES };
The first name in an enum has value 0, the next 1, and so on, unless explicit values are specified. If not all values are specified, unspecified values continue the progression from the last specified value, as the second of these examples:
enum escapes { BELL = '\a', BACKSPACE = '\b', TAB = '\t',NEWLINE = '\n', VTAB = '\v', RETURN = '\r' };
enum months { JAN = 1, FEB, MAR, APR, MAY, JUN,JUL, AUG, SEP, OCT, NOV, DEC };
/* FEB = 2, MAR = 3, etc. */
Names in different enumerations must be distinct. Values need not be distinct in the same enumeration. Enumerations provide a convenient way to associate constant values with names, an alternative to #define with the advantage that the values can be generated for you.
Although variables of enum types may be declared, compilers need not check that what you store in such a variable is a valid value for the enumeration. Nevertheless, enumeration variables offer the chance of checking and so are often better than #defines. In addition, a debugger may be able to print values of enumeration variables in their symbolic form.
An enumeration is a list of constant integer values, as in
enum boolean { NO, YES };
The first name in an enum has value 0, the next 1, and so on, unless explicit values are specified. If not all values are specified, unspecified values continue the progression from the last specified value, as the second of these examples:
enum escapes { BELL = '\a', BACKSPACE = '\b', TAB = '\t',NEWLINE = '\n', VTAB = '\v', RETURN = '\r' };
enum months { JAN = 1, FEB, MAR, APR, MAY, JUN,JUL, AUG, SEP, OCT, NOV, DEC };
/* FEB = 2, MAR = 3, etc. */
Names in different enumerations must be distinct. Values need not be distinct in the same enumeration. Enumerations provide a convenient way to associate constant values with names, an alternative to #define with the advantage that the values can be generated for you.
Although variables of enum types may be declared, compilers need not check that what you store in such a variable is a valid value for the enumeration. Nevertheless, enumeration variables offer the chance of checking and so are often better than #defines. In addition, a debugger may be able to print values of enumeration variables in their symbolic form.
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