C/math.h/frexp

frexp: decomposes the num into a mantissa in the range 0.5 to less than 1, and an integer exponent such that num = mantissa * 2^exp

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//Declaration: float frexpf(float num, int *exp);

              double frexp(double num, int *exp); 
              long double frexpl(long double num, int *exp);  

//Return: The 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);

 }
        

/* 0.625000 4

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