标签：io sp bs nbsp br return print include printf
#include<stdio.h>
int main()
{
int c=1,b=1;
double x=0,a=1.0;
while(a>=1e-6)
{
x=x+a*c;
c=-c;
b=b+2;
a=1.0/b;
}
printf("%lf\n",4*x);
return 0;
}
标签：io sp bs nbsp br return print include printf
原文地址：http://www.cnblogs.com/huan1314/p/4140564.html
