某些函数原型及其用法

函数名: log10
功  能: 对数函数log,以10为底
用  法: double log10(double x);
程序例:#include <math.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;
} 函数名: log
功  能: 对数函数log,以e(2.71828)为底
用  法: double log(double x);
程序例:#include <math.h>
#include <stdio.h>int main(void)
{
   double result;
   double x = 800.6872;   result = log(x);
   printf("The common log of %lf is %lf
", x, result);   return 0;
}