Item Value
Header filemath.h
Declarationfloat logbf(float num);double logb(double num);long double logbl(long double num);
Returnreturns the exponent of num as a floating-point integer value.
#include
#include
int main(void)
{
double val = 1.0;
do {
printf("%f %f\n", val, logb(val));
val++;
} while (val<11.0);
return 0;
}
1.000000 0.000000
2.000000 1.000000
3.000000 1.000000
4.000000 2.000000
5.000000 2.000000
6.000000 2.000000
7.000000 2.000000
8.000000 3.000000
9.000000 3.000000
10.000000 3.000000