函数名: log10

功 能: 对数函数log

用 法: double log10(double x);

程序例:

#include <matn.h>

#include <stdio.h>

int main(void)

{

double result;

double x = 800.6872;

result = log10(x);

printf("The common log of %lf is %lf\", x, result);

return 0;

}