include<math.h> define PI 3.1415927 int main(void){ float s,d;while(scanf("%f",&d)!=EOF){ s=4*d*d*d*PI/3;printf("%.3lf\n",s);} return 0;} 或:int isPrime(unsigned long n) { if (n <= 3) { return n > 1;} else if (n % 2 == 0 |bai| n % 3 =...