The syntax to define a union is simular to the struct keyword as shown below:
union union_def { int a; float b; char c;} ;and a variable declared with either of these statements:
union union_def union_var; union { int a; float b; char c;} union_var;If you wish to initalise a variable you can say:
union { int a; float b; char c;} union_var=97;By default the first variable (a) is initalised.
To assign a value to a variable you can say:
union_var.b=99.99; union_var.a=34; union_var.c='x';It's important to note that the storage will only hold ONE value, looking at the three lines above, union_var.a overwrites union_var.b and then union_var.c overwrites union_var.a
I have yet to see more than one use for this keyword.
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