Method to determine whether a triangle is a triangle in java: (Recommended: java video tutorial)
package Angle; import java.util.Scanner; public class Angle { //判断是否能构成三角形 public static int JudgeAngle(int a,int b,int c) { if(a+b>c&&a+c>b&&b+c>a) { System.out.println("能够构成三角形!"); return 1; } else { System.out.println("不能构成三角形!"); return 0; } } //判断是否能构成等腰三角形 public static int JudgeDangle(int a,int b,int c) { if(a==b||a==c||b==c) { if(a==b&&a==c) { System.out.println("该三角形是等边三角形!"); return 1; } else { System.out.println("该三角形是普通的等腰三角形!"); return 1; } } else { return 0; } } //判断是否是直角三角形 public static int JudgeRangle(int a,int b,int c) { int r1,r2,r3; r1=a*a+b*b-c*c; r2=a*a+c*c-b; r3=b*b+c*c-a*a; /*System.out.println(r1+r2+r3);*/ if(r1==0||r2==0||r3==0) { System.out.println("该三角形是直角三角形!"); return 1; } else { //System.exit(0); return 0; } } public static void main(String [] args) { int a; int b; int c; System.out.println("请输入三角形的三边: "); Scanner scanner=new Scanner(System.in); a=scanner.nextInt(); b=scanner.nextInt(); c=scanner.nextInt(); //判断输入三边是否合法 if(a<0||a>200||b<0||b>200||c<0||c>200) { System.out.println("你输入的三边不合法!"); } else { //判断是否能构成三角形 JudgeAngle(a,b,c); //判断是否是等腰或等边三角形 JudgeDangle(a,b,c); //判断是否是直角三角形 JudgeRangle(a,b,c); //判断是一般三角形 System.out.println("该三角形是一般三角形!"); } } }
The above code determines by judging the length of the three sides Triangular or not.
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