[数据结构与算法]Java暴力GPA转换器（Σ学分*绩点/Σ学分）

public class Demo {

    public static float[] sum(String s) {
        //将字符串划分存入字符串数组
        String[] str = s.split("\\s+");
        float[] f = new float[str.length];
        float[] sum = new float[f.length / 2 + 1];
        int creditSum = 0;

        //将字符串数组转型为float数组
        for (int i = 0; i < str.length; i++) {
            f[i] = Float.parseFloat(str[i]);
        }

        //将学分与对应成绩相乘，将得到的值存入数组
        for (int i = 0; i < f.length; i++) {
            if (i % 2 != 0) {
                float creditXgrade = f[i] * f[i - 1];
                sum[(i - 1) / 2] = creditXgrade;
                creditSum += f[i];
            }
        }
        sum[f.length / 2] = creditSum;

        return sum;
    }

    public static float gpa(float[] sum) {
        float creditXgradeSum = 0;
        for (int i = 0; i < sum.length-1; i++) {
            creditXgradeSum += sum[i];
        }
        float gpa = creditXgradeSum/sum[sum.length-1];

        return gpa;
    }

    public static void main(String[] args) {
        String s = "69 4 73 2.5 68 3（把成绩按照“成绩 学分 成绩 学分”的方式打出来，然后复制到这里即可）";
        //写到这
        System.out.println(gpa(sum(s)));
    }

}