29 August 2018 08:29:59 AM

FUNCTION_POINTER
  C version

  Examples of function pointers.
  We define a variable FUNC which can point to a function.
  Our declaration indicates only that FUNC has two inputs
  of type double, and returns a double as its value.

  We will now set FUNC to a MIN, a MAX and a SUM function
  successively, and invoke it with 5 random sets of input.

  FUNC = R8_MIN
  -----A----  -----B----  C = FUNC ( A, B )

2x,  0.621921,2x,  0.624163,2x,  0.621921
2x,  0.314565,2x,  0.888536,2x,  0.314565
2x,   0.62248,2x, 0.0180997,2x, 0.0180997
2x,  0.200908,2x,  0.667529,2x,  0.200908
2x,  0.165277,2x,  0.803795,2x,  0.165277

  FUNC = R8_MAX
  -----A----  -----B----  C = FUNC ( A, B )

2x,  0.621921,2x,  0.624163,2x,  0.624163
2x,  0.314565,2x,  0.888536,2x,  0.888536
2x,   0.62248,2x, 0.0180997,2x,   0.62248
2x,  0.200908,2x,  0.667529,2x,  0.667529
2x,  0.165277,2x,  0.803795,2x,  0.803795

  FUNC = R8_SUM
  -----A----  -----B----  C = FUNC ( A, B )

2x,0.218418d,2x,  0.956318,2x,   1.17474
2x,0.829509d,2x,  0.561695,2x,    1.3912
2x,0.415307d,2x, 0.0661187,2x,  0.481426
2x,0.257578d,2x,  0.109957,2x,  0.367535
2x,0.043829d,2x,  0.633966,2x,  0.677795

FUNCTION_PONTER:
  Normal end of execution.

29 August 2018 08:29:59 AM