#include <math.h>
double tanh( double arg );
函数返回参数 arg 的双曲正切值。
#include <stdio.h> #include <math.h> int main(void) { double result, x; x = 0.5; result = tanh(x); printf("The hyperbolic tangent of %lf is %lf\n", x, result); return 0; }
输出结果:
The hyperbolic tangent of 0.500000 is 0.462117