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Header filemath.h
Declarationfloat frexpf(float num, int *exp);
double frexp(double num, int *exp);
long double frexpl(long double num, int *exp);
Functiondecomposes the num into a mantissa in the range 0.5 to less than 1, and an integer exponent such that num = mantissa * 2^exp.
ReturnThe mantissa is returned by the function, and the exponent is stored at the variable pointed to by exp.


#include <math.h>
  #include <stdio.h>

  int main(void)
  {
     int e;
     double f;

     f = frexp(10.0, &e);
     printf("%f %d", f, e);
 
  }

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