structure definition

A structure data type is a fixed length array and each component of the array is accessed by its name. Each type of structure is distinguished by its name. A structure data type is declared by struct statement. A structure object is generated by a builtin function newstruct. Each member of a structure is accessed by an operatator ->. If a member of a structure is again a structure, then the specification by -> can be nested.

[1] struct rat {num,denom};
0
[2] A = newstruct(rat);
{0,0}
[3] A->num = 1;
1
[4] A->den = 2;
2
[5] A;
{1,2}

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