#include <iostream>
#include <cmath>
using namespace std;
int main()
{
float q, t, r, u, x, x1, x2,n1,e1;
float p1 = 981,g = 9.80,l = 2.00e-3,b = 8.23e-3,p = 0.101e6,d = 5.00e-3,n = 1.83e-5;
cout<<"先输入时间,再输入电压:"<<endl;
cin >> t>>u;
r = sqrt(9 * n*l / (2 * p1*g*t));
x1 = ((n*l) / (t*(1 + b / (p*r))));
x2 = x1*x1*x1;
x = sqrt(x2);
q = 18 * 3.14*x*d / (sqrt(2 * p1*g)*u);
n1=q/(1.6e-19);
if(n1-int(n1)>=0.5)
{
n1=int(n1)+1;
}
else if(n1-int(n1)<0.5||n1-int(n1)>=0)
{
n1=int(n1);
}
else
{
cout<<"error";
}
e1=q/n1;
cout << "半径r= "<<r <<endl;
cout<<"电量q= "<< q<<endl;
cout<<"油滴所带基本电荷n= "<<n1<<endl;
cout<<"实验数据所得电荷量e= "<<e1;
return 0;
}
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