C语言中有关log函数的算法？

Question

C语言中有关log函数的算法，怎么用啊，说下当一e为底和其他数为底时算法，怎么使用Log希望可以背上一个已经编译好的程序，做好别太难！谢谢！

Answer 1

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