#include main() {int s,n; float pi=0,t; t=float(s)/n; for(s=1,n=1;fabs(t)>1e-6;s=-s,n+=2) {#includemain(){int s,n;float pi=0,t=1;for(s=1,n=1;fabs(t)>1e-6;s=-s,n+=2){t=float(s)/n;pi=pi+t;}pi=4*pi;printf("%10.6f",pi);} 解决了 自己 可是答案3.14
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