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HP-UX Reference Volume 4 of 5 > ffdim(3M) |
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NAMEfdim() — positive difference function DESCRIPTIONThe fdim() function determines the positive difference between its arguments. The ISO/ANSI C committee has approved the fdim() function for inclusion in the C9X draft standard. To use this function, compile either with the default -Ae option or with the -Aa and -D_HPUX_SOURCE options. Make sure your program includes <math.h>. Link in the math library by specifying -lm on the compiler or linker command line. RETURN VALUEThe fdim() function returns the positive difference between x and y. If x > y, fdim() returns x - y. If x <= y, fdim() returns +zero. If x or y is NaN, fdim() returns the same NaN. If both arguments are NaNs, fdim() returns one of the arguments. If the correct value would overflow, fdim() returns +INFINITY. |
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