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| 19.27.1.frexp |
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| Item | Value | | Header file | math.h | | Declaration | float frexpf(float num, int *exp);
double frexp(double num, int *exp);
long double frexpl(long double num, int *exp); | | Function | 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. | | Return | The mantissa is returned by the function, and the exponent is stored at the variable pointed to by exp. |
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#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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0.625000 4 |
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