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modf

#include <cmath>float modf(float num, float *i);double modf(double num, double *i);
long double modf(long double num, long double *i);

The modf( ) function decomposes num into its integer and fractional parts. It returns the fractional portion and places the integer part in the variable pointed to by i.

Related functions are frexp( ) and ldexp( ).


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