求键盘输入的n和实数的方差，求完整代码，谢谢

Question

 

Answer 1

#include<iostream>
#include<math.h>
#include<cstdlib>
using  namespace std;

double average(double& a1,double& a2,double& a3,double& a4)
{
	double ave;
	cout<<"请输入a1,a2,a3,a4的值,保持数据的一致性：" ;
	cin>>a1>>a2>>a3>>a4; 

	ave = (a1+a2+a3+a4)/4;
	return ave;
}
double squareRoot(double& d1,double& d2,double& d3,double& d4)
{
    double b1,b2,b3,b4;
	double sr,aveg;
	aveg = average(b1,b2,b3,b4);
	sr = sqrt((b1-aveg)*(b1-aveg)+(b2-aveg)*(b2-aveg)+(b3-aveg)*(b3-aveg)+(b3-aveg)*(b3-aveg));
	return sr;	
}
int main()
{
	double s1,s2,s3,s4;
	double m,n;
	char ans;
	do
	{ 
	m =average(s1,s2,s3,s4);
	n = squareRoot(s1,s2,s3,s4);
	cout<<"输入的4个数的平均值为："<<m<<endl;
	cout<<"输入的4个数的标准差为："<<n<<endl; 
	cout<<"test again";
	cout<<"(Type Y or Y for yes or type N or n for no):";
	cin>>ans;
	cout<<endl;
	} while(ans == 'Y'||ans == 'y');
	return 0;
 } 

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