怎样用c语言编写求PI的近似值?

#include#includemain(){ double t,pi; long int n,s; t=1。0; n=1; s=1; pi=0。0; while (fabs(t)>=1e-6){ pi=pi+t; n=n+2; s=-s; t=(float)(s)/(float)(n); } pi=pi*4; printf(" pi=%lf\n",pi); }