C语言 编程用π/4=1-1/3+1/5-1/7+.的公式求π的近似值
#include
main()
{int s;
float n,t,pi;
t=1;pi=0;n=1,0;s=1;
while(填空)
｛pi=pi+t;
n=n+2;
s=-s;
t=s/n;｝
pi=pi*4
printf("pi=%f\n",pi)}