我必须创建类来实现与其他人的主类,由于某种原因,我没有得到正确的输出,我不知道我的计算是关闭的,我不认为他们或我的插入上课是错误的。为什么我的代码输出错误?我的插入类错了吗?
预期输出:
中位数= 44.5
平均数= 49.300
SD = 30.581
实际输出:
中位数= 0.0
平均数= 0.967
SD = 4.712
public class StatPackage {
int count;
double [] scores;
final int MAX = 500;
StatPackage() {
count = 0;
scores = new double[MAX];
}
public void insert (double value) {
if (count < MAX){
scores[count] = value;
++ count;
}
}
public double Mean() {
double sum = 0;
//For loop for calculating average or mean
for(int i = 0; i < scores.length; i++){
sum += (scores[i]);
count++;
}
double average = sum/count;
return average;
}
public double Median() {
int min;
int tmp;
int size;
for (int i = 0; i < scores.length - 1; i ++)
{
min = i;
for (int pos = i + 1; pos < scores.length; pos ++)
if (scores [pos] < scores [min])
min = pos;
tmp = (int)scores [min];
scores [min] = scores [i];
scores [i] = tmp;
}
double median = 0;
if (scores.length % 2 == 0){
median = (scores[scores.length/2-1] + scores[scores.length/2])/2;
}
else {
median = (scores[((scores.length/2))]);
}
return median;
}
public double Variance() {
double variance = 0;
double sum = 0;
//For loop for getting the variance
for(int i = 0; i < scores.length; i++){
sum += scores[i];
variance += scores[i] * scores[i];
count++;
}
double varianceFinal = ((variance/count)-(sum*sum)/(count*count));
return (varianceFinal);
}
public double StdDev (double variance) {
double sum = 0;
for(int i = 0; i < scores.length; i++){
sum += scores[i];
variance += scores[i] * scores[i];
count++;
}
double varianceFinal = ((variance/count)-(sum*sum)/(count*count));
return Math.sqrt(varianceFinal);
}
}
尝试调试器下运行它。 – JJF