Java 打印结果表时出现问题
我试图让它每次打印一个结果列表的时间是一个整数(ei,2.0,4.0,12.0等),但它只打印第一行结果。if条件是否错误?还是我打印值的命令 包装a03 导入java.util.Scanner /** * *@author Calvin(A00391077)该程序模拟按预设值发射的加农炮 *由用户设置。 */ 公共级大炮{Java 打印结果表时出现问题,java,output,Java,Output,我试图让它每次打印一个结果列表的时间是一个整数(ei,2.0,4.0,12.0等),但它只打印第一行结果。if条件是否错误?还是我打印值的命令 包装a03 导入java.util.Scanner /** * *@author Calvin(A00391077)该程序模拟按预设值发射的加农炮 *由用户设置。 */ 公共级大炮{ public static final double DELTA_T = 0.001; public static final double GRAVITY = 9.81;
public static final double DELTA_T = 0.001;
public static final double GRAVITY = 9.81;
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
//variables
Scanner kbd = new Scanner(System.in);
double muzzleVelocity, muzzleHeight, time, height, velocity;
//introducing program
System.out.println("Cannon Simulation");
System.out.println("-----------------");
System.out.println();
System.out.println("This program simulates firing a cannon straight"
+ "up into the air. Velocity");
System.out.println("is measured in metres per second squared and"
+ " height in meteres.");
System.out.println();
System.out.println("By Calvin Elliott (A00391077");
System.out.println();
System.out.println("...press enter...");
kbd.nextLine();
System.out.println();
//getting muzzle velocity
System.out.println("What is the muzzle velocity of the projectile?");
muzzleVelocity = kbd.nextDouble();
while (muzzleVelocity <= 0) {
System.out.println("The velocity must be positive");
System.out.println("What is the muzzle velocity of the projectile?");
muzzleVelocity = kbd.nextDouble();
}
//getting muzzle height
System.out.println("what height is the muzzle above the ground?");
muzzleHeight = kbd.nextDouble();
while (muzzleHeight <= 0) {
System.out.println("The position must be positive");
System.out.println("What height is the muzzle above the ground?");
muzzleHeight = kbd.nextDouble();
}
//calculations
height = muzzleHeight;
velocity = muzzleVelocity;
time = 0;
System.out.println("TIME HEIGHT VELOCITY");
System.out.println("---- ------ --------");
while (height > 0) {
if ((time % 1.0) < DELTA_T) {
System.out.printf("%6.2f%10.3f%10.3f\n", time, height, velocity);
}
height = (height + (velocity * time));
velocity = (velocity - (GRAVITY * time));
time = (time + 0.001);
}
}
公共静态最终双增量T=0.001;
公共静态最终双重力=9.81;
/**
*@param指定命令行参数
*/
公共静态void main(字符串[]args){
//变数
扫描仪kbd=新扫描仪(System.in);
双喷嘴速度,喷嘴高度,时间,高度,速度;
//介绍程序
System.out.println(“火炮模拟”);
System.out.println(“--------------------------”;
System.out.println();
System.out.println(“此程序模拟直接发射大炮”
+“上升到空中。速度”);
System.out.println(“单位为米/秒平方和”
+“高度单位为米。”);
System.out.println();
System.out.println(“由卡尔文·埃利奥特(A00391077))编写;
System.out.println();
System.out.println(“…按enter…”);
kbd.nextLine();
System.out.println();
//获得初速
System.out.println(“弹丸的初速是多少?”);
喷嘴速度=kbd.nextDouble();
而(muzzleVelocity则是通过速度*时间
增加高度,这是每次迭代的绝对时间量。您需要通过时间增量
增量
例如:
while (height > 0) {
if ((time % 1.0) < DELTA_T) {
System.out.printf("%6.2f%10.3f%10.3f\n", time, height, velocity);
}
height = (height + (velocity * DELTA_T));
velocity = (velocity - (GRAVITY * DELTA_T));
time = (time + DELTA_T);
}
while(高度>0){
如果((时间%1.0)
同样值得注意的是,重力通常应该是负值,这样你就可以把它加到速度上,就像你把速度加到位置上一样。你试过时间%1.0==0吗?现在一切都很有意义。非常感谢你。@CalElliott,你是新来的。一个好的做法是接受最佳答案。左边的复选标记。。。