摘要：
#include#includeint f(int c);int main(void){ int i,x,c; double s,a,b; scanf("%d",&x); i=1,s=1; while(fabs(a)>=0.00001){ b=-1; a=pow(x,2*i-1); i++; c=f(c); s=s+a*b/c; b=-b; } printf("%.6f\n",s); return 0;}int f(int c){ int j,i=1; c=1; for(j=1;j<=2*i-1;j++) c=c*j; return 阅读全文
