题解 | #牛牛的水杯#
牛牛的水杯
https://www.nowcoder.com/practice/c196c47c23394bf3bdd4f82a838df6bf
#include <stdio.h>
#include <math.h>
#define PI 3.14
int main() {
int h,r;
scanf("%d %d",&h,&r);
float v = PI * h * r *r*0.001;
int n = (int)10/v;
if(10%v != 0) //浮点数相除不能直接用/，/是整数运算符，浮点数相除应该用数学库中的fmod
n = (int)(10/v) +1;
printf("%d\n",n);
return 0;
}
