我知道这里已经有关于三角形的Java问题了,但是我已经尝试过查找并且无法找到解决问题的方法。
我正在完成一项家庭作业,我需要提供三角形边的长度(用户可以按任何顺序提供。
我必须找到除了scalene之外的三角形的类型(右,等腰等),因为那不在说明书中。我还必须找到三角形的区域。
我有一百多行,但仍然根本不起作用。没有任何错误阻止它编译;它只是在执行时无法正常工作。
非常感谢任何帮助。
import javax.swing.JOptionPane;
public class TriangleChecker {
public static void main(String[] args) {
Boolean triangle, right, equilateral, isosceles;
triangle = false;
right = false;
equilateral = false;
String side1, side2, side3;
double s1, s2, s3, perimeter, areai, bi, hi, fhi, be, he, fhe, areae, br, hr, arear;
System.out.println("Hello welcome to the Triangle Checker");
side1 = JOptionPane.showInputDialog("Please enter side 1 of the triangle.");
side2 = JOptionPane.showInputDialog("Please enter side 2 of the triangle.");
side3 = JOptionPane.showInputDialog("Please enter side 3 of the triangle.");
s1 = Double.parseDouble(side1);
s2 = Double.parseDouble(side2);
s3 = Double.parseDouble(side3);
if ((s1 > s2 + s3) || (s2 > s1 + s3) || (s3 > s1 + s2)) {
triangle = false;
}
else {
triangle = true;
}
if ((s1 > s2 && s1 > s3) && (s1*s1 == s2*s2 + s3*s3)) {
right = true;
}
else if((s2 > s1 && s2 > s3) && (s2*s2 == s1*s1 + s3*s3)) {
right = true;
}
else if((s3 > s1 && s3 > s2) && (s3*s3 == s1*s1 + s2*s2)) {
right = true;
}
else {
right = false;
}
if((s1 == s2) && (s1 == s3)) {
equilateral = true;
right = false;
isosceles = false;
}
else {
equilateral = false;
}
if((s1 == s2) && (s1 != s3)) {
isosceles = true;
}
else if((s1 == s3) && (s1 != s2)) {
isosceles = true;
}
else if((s2 == s3) && (s1 != s3)) {
isosceles = true;
}
else {
isosceles = false;
}
if((isosceles = true) && (s1 == s2)) {
bi = (s3/2);
hi = ((s1*s1) - (bi*bi));
fhi = Math.sqrt(hi);
areai = bi * fhi;
}
else if((isosceles = true) && (s1 == s3)) {
bi = (s2/2);
hi =((s1*s1) - (bi*bi));
fhi = Math.sqrt(hi);
areai = bi * fhi;
}
else if((isosceles = true) && (s2 == s3)) {
bi = (s1/2);
hi = ((s2*s2) - (bi*bi));
fhi = Math.sqrt(hi);
areai = bi * fhi;
}
else {
bi = 0;
hi = 0;
fhi = 0;
areai = bi * fhi;
}
if(equilateral == true) {
be = (s1/2);
he = ((s2*s2) - (be*be));
fhe = Math.sqrt(he);
areae = be*he;
}
else {
be = 0;
he = 0;
fhe = 0;
areae = 0;
}
if((right = true) && (s1 < s2) && (s1 < s3) && (s2 < s3)) {
br = (s1/2);
hr =(s2);
arear = br*hr;
}
else if((right = true) &&(s1 < s2) && (s1 < s3) && (s3 < s2)) {
br = s1/1;
hr = s3;
arear = br*hr;
}
else if((right = true) && (s2 < s1) && (s2 < s3) && (s1 < s3)) {
br = s2/2;
hr = s1;
arear = br*hr;
}
else if((right = true) && (s2 < s1) && (s2 < s3) && (s3 < s1)) {
br = s2/2;
hr = s3;
arear = br*hr;
}
else if((right = true) && (s3 < s1) && (s3 < s2) && (s1 < s2)) {
br = s3/2;
hr = s1;
arear = br*hr;
}
else if((right = true) && (s3 < s1) && (s3 < s2) && (s2 < s1)) {
br = s3/2;
hr = s2;
arear = br*hr;
}
else {
br = 0;
hr = 0;
arear = 0;
}
perimeter = s1 + s2 + s3;
if(triangle = true) {
System.out.println("This is a triangle.");
}
else {
System.out.println("This does not equal a triangle.");
System.exit(0);
}
if (right == true) {
equilateral = false;
isosceles = false;
}
else if (equilateral == true) {
right = false;
isosceles = false;
}
else {
equilateral = false;
right = false;
}
if(right = true) {
System.out.println("This is a right triangle.");
}
else {
System.out.println("This is not a right triangle.");
}
if (equilateral = true) {
System.out.println("This is an equilateral triangle.");
}
else {
System.out.println("This is not an equilateral triangle.");
}
if (isosceles = true) {
System.out.println("This is an isosceles triangle.");
}
else {
System.out.println("This is not an isosceles triangle.");
}
if ((arear == 0) && (areae == 0)) {
System.out.println("The area of the triangle is " + areai + ".");
}
else if ((areai == 0) && (arear == 0)) {
System.out.println("The area of the triangle is " + areae + ".");
}
else {
System.out.println("The area of the triangle is " + arear + ".");
}
}
}
答案 0 :(得分:-1)
这种方式完全颠覆了你的问题 - 我没有真正挖掘你的代码,所以不知道为什么它失败了,但你可能会作弊一点并使用数学来找到使用的区域Heron's formula让您简化代码。
苍鹭的公式可以让你提供任何三角形(右边,等边或斜角面)三边的长度,并在不知道任何角度的情况下计算区域。
由于这听起来像是家庭作业,我不确定你的老师是否允许这种解决方案,但可能值得研究。
苍鹭的公式定义为
...其中a,b和c是边长,s定义为:
我会把它作为练习让你弄清楚如何实现公式(如果你决定使用它)。作为提示,Math
模块可以使用sqrt
方法。