- public class Equation2 {
- private static float x1;
- private static float x2;
- private static float x;
- private static float real;
- private static float imag;
- private static float[] results;
- private static float a;
- private static float b;
- private static float c;
- private static float delt;
- public static void calc(float w,float p,float q){
- results=new float[2];
- a=w; b=p; c=q;
- if(0.0f==a){ //bx+c=0; x=-c/b;
- if(0.0f!=b){
- x=-c/b;
- results[0]=x;
- }else{
- System.err.println("不是一个方程!");
- return;
- }
- }else{
- delt=b*b-4*a*c;
- if(delt>=0){
- x1=(float) ((-b+Math.sqrt(delt))/(2*a));
- x2=(float) ((-b-Math.sqrt(delt))/(2*a));
- results[0]=x1;
- results[1]=x2;
- }else{
- real=-b/(2*a);
- imag=(float) (Math.sqrt(-delt)/(2*a));
- results[0]=real;
- results[1]=imag;
- }
- }
- }
- public static void print(){
- if(0.0f==a){
- if(0.0f!=b){
- System.out.println("该方程是一元一次方程,其根为:x="+results[0]);
- }else{
- System.err.println("不是一个方程!");
- }
- }else{
- if(delt>=0){
- System.out.println("该方程是一元二次方程,两根分别为:x1="+results[0]+",x2="+results[1]);
- }else{
- System.out.println("该一元二次方程的根为复数,两根分别为:x1="+results[0]+"+"+results[1]+"i"+",x2="+results[0]+"-"+results[1]+"i");
- }
- }
- }
- public static void main(String[] args) {
- float a=1.0f;
- float b=2.0f;
- float c=2.0f;
- Equation2.calc(a,b,c);
- Equation2.print();
- Math.sqrt(a);
- }
- }
时间: 2024-10-06 19:56:30