Материал из C\C++ эксперт
log: returns the natural logarithm for num
//Header file: #include <math.h>
//Declaration: float logf(float num);
double log(double num);
long double logl(long double num);
#include <math.h>
#include <stdio.h>
int main(void)
{
double val = 1.0;
do {
printf("%f %f\n", val, log(val));
val++;
} while (val<11.0);
return 0;
}
/*
1.000000 0.000000
2.000000 0.693147
3.000000 1.098612
4.000000 1.386294
5.000000 1.609438
6.000000 1.791759
7.000000 1.945910
8.000000 2.079442
9.000000 2.197225
10.000000 2.302585
*/
