import java.util.Scanner;
//输入上次考试成绩(int)和本次考试成绩(int),然后输出成绩提高的百分比,保留两位小数位(例如,21.75%)
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.print("请输入上次成绩:");
int prev = in.nextInt();
System.out.print("请输入本次成绩:");
int score = in.nextInt();
double percent = (score-prev)/(double)prev;
System.out.printf("成绩提高了%.2f%%",percent*100);
}
}
YANGZY1202
在Eclipse中先输入Scanner(其实不用写完,写个Scan也行),然后用Alt+/,选择”Scanner -java.util“,IDE会自动生成在main函数之前的import java.util.Scanner; 然后再写Scanner的对象就行了