C语言,把这个改为for语句,

...
for (;;)
{ if (fabs(term)>=1e-6) break;
pi=pi+term;
n=n+2;
sign=-sign;
term=sign/n;
}
...

for (;1.0/n>=1e-6;n+=2)
{
pi+=1.0/n*sign;
sign*=-1;
}
或者百度搜索,用for语句求π值