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Fpclassify(fpval)

int fpclassify(fpval) Returns FP_INFINITE, FP_NAN, FP_NORMAL, FP_SUBNORMAL, or FP_ZERO, depending upon the value in fpval. These macros are defined by . #include <stdio.h> #include <math.h> int main(void) {   printf("fpclassify(-1.0) %d\n", fpclassify(-1.0));   printf("fpclassify(1.0) %d\n", fpclassify(1.0));   printf("fpclassify(1.0/0.0) %d\n", fpclassify(1.0/0.0));   return 0; } fpclassify(-1.0) 1024 fpclassify(1.0) 1024 fpclassify(1.0/0.0) 1280