必须在球队投篮命中率的一组数据中找到最大值和最小值。
import java.io.*;
import java.util.Scanner;
public class kstatebball
{
public static void main(String [] args)
throws FileNotFoundException
{
Scanner in = new Scanner(new File("data1.txt"));
String[] firstname = new String [100];
String[] lastname = new String [100];
int fgm[] = new int [100];
int fga[] = new int [100];
double fgp = 0;
int maxFGP;
int minFGP;
System.out.print(" Player FGM FGA FGP%\n");
int count = 0;
for( int i = 0;in.hasNext(); i++)
{
firstname[i] = in.next();
lastname[i] = in.next();
fgm[i] = in.nextInt();
fga[i] = in.nextInt();
fgp = (1.0 * fgm[i]) / (1.0 * fga[i]) * 100;
count++;
System.out.printf("%10s %10s %3d %3d %3.1f \n",firstname[i],lastname[i],fgm[i],fga[i],fgp);
}
maxFGP = maxFGP(fgm,fga,count);
minFGP = minFGP(fgm,fga,count);
System.out.printf("\n\nThe player with the highest field goal percentage is: %3d ",maxFGP(fgm,fga,count));
System.out.printf("\nThe player with the lowest field goal percentage is : %3.1f",fgp);
}
public static int maxFGP(int[] fgm, int[] fga, int count)
{
int max = 0;
for(int i = 0; i < count; i++)
{
if((1.0 * fgm[i]) / (1.0 * fga[i]) * 100 > max)
max = i;
}
return max;
}
public static int minFGP(int[]fgm, int[]fga, int count)
{
int min = 0;
for(int i = 0; i > 13; i++)
{
if(fgm[i] > fgm[count])
count = i;
}
return min;
}
}
需要“if”语句的帮助才能返回正确的最大值
我们拥有所有球员的百分比，但需要使用这些方法才能找到具有最高投篮命中率和最低投篮命中率的球员。
这是我正在使用的数据文件：
Marcus Foster 123 288
Thomas Gipson 102 178
Shane Southwell 88 224
Will Spradling 58 144
Wesley Iwundu 53 111
Nino Williams 49 96
Nigel Johnson 28 80
Jevon Thomas 15 58
D.J. Johnson 34 68
Omari Lawrence 27 65
Shawn Meyer 2 4
Ryan Schultz 2 9
Jack Karapetyan 1 4
Brian Rohleder 1 2
答案 0 :(得分：2)
应该是这样的：
public static int maxFGP(int[] fgm, int[] fga, int count)
{
int max = 0;
double maxValue=(1.0 * fgm[0]) / (1.0 * fga[0]) * 100;
for(int i = 0; i < count; i++)
{
if((1.0 * fgm[i]) / (1.0 * fga[i]) * 100 > maxValue)
{
max = i;
maxValue=(1.0 * fgm[i]) / (1.0 * fga[i]) * 100;
}
}
return max;
}
注意：您已设置int max = 0;，因此无需从i=0循环播放。改为int i=1而不是
以最大值打印播放器的名称：
System.out.printf("\n\nThe player with the highest field goal percentage is: %3d ",firstname[maxFGP(fgm,fga,count)]);
答案 1 :(得分：0)
max是一个数组索引，我建议你添加另一种方法来计算百分比
public static int maxFGP(int[] fgm, int[] fga, int count)
{
int max = 0;
for(int i = 1; i < count; i++){
if(fieldGoalPercentage(fgm, fga, i) > fieldGoalPercentage(fgm, fga, max))
max = i;
}
return max;
}
答案 2 :(得分：0)
Java是一种面向对象的语言。你可能是初学者，但这是考虑它的另一种方式。
从Player对象开始：
package misc;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* misc.Player
* @author Michael
* @link http://stackoverflow.com/questions/21843505/calculating-max-field-goal-percentage-in-a-method-in-java-program
* @since 2/17/14 10:07 PM
*/
public class Player {
private final String firstName;
private final String lastName;
private final int numAttempts;
private final int numMakes;
public static void main(String[] args) {
List<Player> team = new ArrayList<Player>() {{
add(new Player("Larry", "Bird", 40, 80));
add(new Player("Robert", "Parish", 4, 10));
add(new Player("Dennis", "Johnson", 35, 50));
}};
System.out.println("before sort: " + team);
Collections.sort(team, new Comparator<Player>() {
@Override
public int compare(Player that, Player other) {
if (that.getFieldGoalPercentage() < other.getFieldGoalPercentage()) {
return -1;
} else if (that.getFieldGoalPercentage() > other.getFieldGoalPercentage()) {
return +1;
} else {
return 0;
}
}
});
System.out.println("after sort: " + team);
}
public Player(String firstName, String lastName, int numMakes, int numAttempts) {
this.firstName = (isBlank(firstName) ? "" : firstName);
this.lastName = (isBlank(lastName) ? "" : lastName);
this.numAttempts = (numAttempts < 0 ? 0 : numAttempts);
this.numMakes = (numMakes < 0 ? 0 : numMakes);
if (this.numMakes > this.numAttempts) {
throw new IllegalArgumentException(String.format("number of makes %d cannot exceed number of attempts %d", numMakes, numAttempts));
}
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public int getNumAttempts() {
return numAttempts;
}
public int getNumMakes() {
return numMakes;
}
public double getFieldGoalPercentage() {
double fieldGoalPercentage = 0.0;
if (this.numAttempts > 0) {
fieldGoalPercentage = ((double) numMakes)/numAttempts;
}
return fieldGoalPercentage;
}
public static boolean isBlank(String s) {
return ((s == null) || (s.trim().length() == 0));
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Player player = (Player) o;
return firstName.equals(player.firstName) && lastName.equals(player.lastName);
}
@Override
public int hashCode() {
int result = firstName.hashCode();
result = 31 * result + lastName.hashCode();
return result;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("misc.Player{");
sb.append("firstName='").append(firstName).append('\'');
sb.append(", lastName='").append(lastName).append('\'');
sb.append(", numAttempts=").append(numAttempts);
sb.append(", numMakes=").append(numMakes);
sb.append(", percentage=").append(getFieldGoalPercentage());
sb.append('}');
return sb.toString();
}
}