java统一改代码 java程序修改

Java修改代码你写的程序,把那个int型的转化后你会发现还有别的错误!
建议你在做程序时,有解决补了的问题去查下JAVA帮助!
int转String的方法:String.valueOf(int a)
String转int
Integer.valueOf(String str)返回保存指定的 String 的值的 Integer 对象 。将该参数解释为表示一个有符号的十进制整数, 就好像将该参数赋予 parseInt(java.lang.String) 方法一样 。结果是一个表示字符串指定的整数值的 Integer 对象 。
【java统一改代码 java程序修改】1楼所说的也时一种转换方法,JAVA帮助时编程时少不了的东西!
java代码修改高分求解把这一段放在一个循环里,然后判断是否继续输入的值,如果继续,那就继续下一次循环,如果停止 , 则跳出循环
计算次数放在小循环里 , 每输入一次加1,在大循环里定义 , 每次大循环都会从0开始
while(true){
int count = 0;
int number = rand.nextInt(100);
System.out.print("Your guess?");
int guess = console.nextInt();
do{
if (guessnumber){
count++;
System.out.println("It's lower.");
System.out.print("Your guess?");
guess = console.nextInt();
i++;
}else if (guessnumber){
System.out.println("It's higher.");
System.out.print("Your guess?");
guess = console.nextInt();
i++;
}
}while(guess != number);
if(guess == number){
System.out.println("You got it right in " + i + " guesses!");
System.out.println("Do you want to play again?");
String line = console.nextLine();
if (line.startsWith("Y")||line.startsWith("y")) {
guess();
}else if (line.startsWith("N")||line.startsWith("n")) {
break;
}
}
}
JAVA代码修改你java统一改代码的代码有很多问题java统一改代码,最主要的一个吧就是你的inverse函数的参数没传进去java统一改代码,你自己定义一个空矩阵num[][],计算秩 , 怎么算都是零,然后就返回 null,自然就报空指针异常了 。我改好了程序,供你参考java统一改代码:
import java.util.Scanner;
public class Project2 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请依次输入java统一改代码:a11、a12、a13、a21、a22、a23、a31、a32、a33\n");
int i, j;
double[][] number = new double[3][3];
double[][] number0 = new double[3][3];
for (i = 0; i3; i++)
for (j = 0; j3; j++)
number[i][j] = input.nextDouble();
System.out.println("Input Matrix is :");
System.out.println(number[0][0] + " " + number[0][1] + " "
+ number[0][2]);
System.out.println(number[1][0] + " " + number[1][1] + " "
+ number[1][2]);
System.out.println(number[2][0] + " " + number[2][1] + " "
+ number[2][2]);
number0 = inverse(number);
if (number0 != null) {
System.out.println("Inverse Matrix is :");
System.out.println(number0[0][0] + " " + number0[0][1] + " "
+ number0[0][2]);
System.out.println(number0[1][0] + " " + number0[1][1] + " "
+ number0[1][2]);
System.out.println(number0[2][0] + " " + number0[2][1] + " "
+ number0[2][2]);
} else
System.out.println("矩阵的秩为零");
}
public static double[][] inverse(double[][] A) {
double z;
double A1, B, C, D, E, F, G, H, I;
// double [][] num = new double [3][3];
double[][] num0 = new double[3][3];
System.out.println("Inverse Matrix A is :");
System.out.println(A[0][0] + " " + A[0][1] + " " + A[0][2]);
System.out.println(A[1][0] + " " + A[1][1] + " " + A[1][2]);
System.out.println(A[2][0] + " " + A[2][1] + " " + A[2][2]);
z = A[0][0] * A[1][1] * A[2][2] + A[2][0] * A[0][1] * A[1][2] + A[0][2]

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