Fortran Array Assignment

Fortran Array Assignment-16
The MIPSpro Fortran Language Reference Manual, Volume 2, describes how any operator can be made generic by the programmer using a generic specifier on an interface block.The rules for interpretation of an expression are provided by the interpretation of each operator in the expression.

The MIPSpro Fortran Language Reference Manual, Volume 2, describes how any operator can be made generic by the programmer using a generic specifier on an interface block.The rules for interpretation of an expression are provided by the interpretation of each operator in the expression.

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Intrinsic operators can be extended further by the programmer to operate on operands of types for which there are no intrinsic operations.

Similarly, you can use defined unary and defined binary operators to operate on operands of types for which there are no previous definitions.

The rules for construction of expressions (the syntax rules) are the same for user-defined operators as for intrinsic operators.

The general rule for evaluation of a Fortran expression states that any method that is mathematically equivalent to that provided by the construction and interpretation rules for the expression is permitted, provided the order of evaluation indicated by explicit parentheses in the expression is followed.

When the operator is an intrinsic operator such as with two numeric operands means that the two operands are added together.

For the user-defined operators, the interpretation is provided by a user-supplied function subprogram with a designation that this subprogram is to be used to define the operation.

Thus, a compiler has a great deal of freedom to rearrange or optimize the computation, provided the rearranged expression has the same mathematical meaning.

Arrays and pointers as objects can appear in expressions and assignment statements.

Expressions often involve nonnumeric values, such as character strings, logical values, or structures; these also can be considered to be formulas that involve nonnumeric quantities rather than numeric ones.

This chapter describes how valid expressions can be formed, how they are interpreted, and how they are evaluated.

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