.1f%+fi\n",creal(z4),cimag(z4));} 输出: 2*log(i)=0.0+3.141593i4*log(sqrt(2)/2+sqrt(2)i/2)=0.0+3.141593ilog
S=-Σn-1 I=0P ILOG%28P I%29 确定性随机数发生器%28例如。伪随机引擎%29的熵为零.