Item Value
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
#include
int main(void)
{
int e;
double f;
f = frexp(10.0, &e);
printf("%f %d", f, e);
}
0.625000 4