李双45678

摘要： 1,#includeint main(void){double r,s;printf("Enter r:");scanf("%Lf",&r);if (rint main(void){int n,r,h,i;double v;printf("Enter n:");scanf("%d",&n);for(i=0;i0&&h>0){v=3.14*r*r*h;printf("%lf\n",v);}else {printf("error");}}re 阅读全文