import java.util.*;
import java.io.*;
public class PracticeFinal {
public static void main (String[] args) throws FileNotFoundException{
Scanner input = new Scanner (new File("altitude.txt"));
int[] x = new int [400];
int[] y = new int [400];
float[] altitude = new float [400];
x[0] = 0;
y[0] = 0;
altitude[0] = 0;
int i = 0;
System.out.println("x\ty\taltitude");
while (input.hasNextFloat()) {
int line = input.nextInt();
x[i]=line;
int line2=input.nextInt();
y[i]=line2;
float line3 = input.nextFloat();
altitude[i]=line3;
System.out.println(x[i]+"\t" + y[i]+"\t"+ altitude[i]+"\t");
i+=1; }
printMax(altitude,x,y);
printMin(altitude,x,y);
printAverage(altitude);
printContour(altitude,x,y);
}
public static void printMax(float []altitude, int []x, int []y) {
float max=altitude[0];
int ind=0;
for(int i=0;i<100;i++)
{
if (altitude[i]>max)
{
max = altitude[i];
ind=i;
}
}
System.out.println("The maximum altitude is "+"("+x[ind]+","+y[ind]+","+max+")");
}
public static void printMin(float []altitude, int []x, int []y){
float min=altitude[0];
int ind=0;
for(int i=0;i<100;i++)
{
if (altitude[i] < min)
{
min = altitude[i];
ind=i;
}
}
System.out.println("The minimum altitude is "+"("+x[ind]+","+y[ind]+","+min+")");
}
public static void printAverage(float []altitude){
float total = 0;
for(int i=0;i<100;i++)
{
total += altitude[i];
}
float avg = total / 100;
System.out.printf("The aveage altitude of the region is " + "%.2f", avg);
System.out.println();
}
public static void printContour(float []altitude, int[]x, int[]y){
for (int i=0;i<100;i++) {
System.out.print (altitude[i] + " ");
}
}
}
我需要帮助这个程序的最后一部分有一个x和y图表，高度为ex，0,0 = 109.1 1,0 = 200 所以对于最后一种方法，我需要打印出相应位置的高度，从1,1到2,1到3,1等等 在for循环之后不知道下一步该做什么 这是文件im读取第一个数字是x秒是y，第三个是海拔。
1 1 101.0
2 2 97.2
3 3 112.3
4 4 114.2
5 5 100.2
6 6 97.5
7 7 97.8
8 8 81.3
9 9 105.4
10 10 108.7
3 1 107.8
3 2 115.4
3 4 118.3
3 5 120.3
3 6 122.3
3 7 90.3
3 8 81.7
3 9 87.4
3 10 113.2
1 2 102.3
1 3 104.5
1 4 109.8
1 5 99.8
1 6 88.9
1 7 89.3
1 8 100.1
1 9 110.8
1 10 98.3
2 1 98.8
2 3 80.5
2 4 85.1
2 5 83.2
2 6 92.3
2 7 94.3
2 8 199.3
2 9 104.3
2 10 105.2
4 1 120.5
4 2 87.3
4 3 82.3
5 1 83.2
5 2 84.5
5 3 96.9
5 4 86.7
4 5 115.3
4 6 101.3
4 7 102.6
4 8 106.9
4 9 109.8
4 10 93.4
6 7 93.2
6 8 92.4
6 9 80.9
6 10 81.2
5 6 102.3
5 7 101.1
5 8 106.7
5 9 105.3
5 10 88.9
6 1 80.8
6 2 81.3
6 3 84.5
6 4 90.8
6 5 99.8
8 1 98.6
8 2 101.1
8 3 103.5
8 4 104.6
8 5 105.8
8 6 80.9
8 7 80.1
7 1 98.3
7 2 96.4
7 3 95.1
7 4 83.4
7 5 95.1
7 6 96.3
7 8 99.9
7 9 100.0
7 10 102.3
10 3 99.9
10 4 98.3
10 5 91.3
10 6 94.3
10 7 95.3
10 8 103.2
8 9 90.2
8 10 91.3
9 1 93.2
9 2 81.5
9 3 91.0
9 4 95.3
9 5 122.3
9 6 119.8
9 7 118.7
9 8 117.3
9 10 107.8
10 1 108.8
10 2 109.9
10 9 104.2
答案 0 :(得分：0)
public static void printContour(float []altitude, int[]x, int[]y){
for (int i = 0; i < 100; i++) {
for (int a = 0; a < 100; a++) {
if (x[i] < x[a]) {
int temp_for_x = x[i];
x[i] = x[a];
x[a] = temp_for_x;
int temp_for_y = y[i];
y[i] = y[a];
y[a] = temp_for_y;
float temp_for_alt = altitude[i];
altitude[i] = altitude[a];
altitude[a] = temp_for_alt;
}
if(y[i] < y[a]){
int temp_for_x = x[i];
x[i] = x[a];
x[a] = temp_for_x;
int temp_for_y = y[i];
y[i] = y[a];
y[a] = temp_for_y;
float temp_for_alt = altitude[i];
altitude[i] = altitude[a];
altitude[a] = temp_for_alt;
}
}
}
for (int incr=0;incr<100;incr++) {
System.out.print(x[incr]+ " " + y[incr] + " " + altitude[incr]+ " ");
if(incr%10 == 9)
System.out.println();
}
}
}
您可以使用更好的排序算法Here