计算 1+1/2!+1/3!+1/4!+...1/20!=?
//计算 1+1/2!+1/3!+1/4!+...1/20!=? double i ; double s=0; double a=1; for(i=1;i<=20;i++) { a=a*i; s=s+1/a; } System.out.println(s);