ZZULIOJ 1103: 平均学分绩点（函数专题），Java

1103: 平均学分绩点（函数专题）

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
    Scanner cin = new Scanner(System.in);int n=cin.nextInt();int sum_credit=0,sum_score=0;for(int i=1;i<=n;i++){
    int credit=cin.nextInt();int score=cin.nextInt();sum_credit+=credit;if(score>=60) sum_score+=(score-50)/10*credit;}System.out.printf("%.1f",1.0*sum_score/sum_credit);}
}