我无法找到2D阵列中最低的平均值！ （最高AVG作品）

Question

我无法在2D阵列中找到最低的平均值，找到最高的AVG可以工作，但在找到最低的AVG时会得到垃圾数据。 这是我的功能： 我发现最高=最高，但我发现最高，但没有解决方案。我知道问题可能在最低位置初始化为[0] [[0]，因此你找不到小于[0] [0]的值。有什么帮助吗？

void averaging(double gpa [][NUM_QTRS], double gpa2[][QTR_NUM])
 {
double highest, lowest;
double totalAvg = 0;

highest = gpa2[0][0];
lowest = gpa2[0][0];

for (int stu = 0; stu < NUM_STUDENTS; stu++)
{
    double total = 0;
    double avg = 0;
    double temp;


    // sum up all gpas for 1 student
    for(int i = 0; i < NUM_QTRS; i++)
    {
        total = total + gpa[stu][i];

    }

    // calculate average gpa for 1 student
    avg = total / NUM_QTRS;


    //fill second row with GPA of each student

    gpa2[0][stu] = stu + 1;
    gpa2[1][stu] = avg;

    if(gpa2 [1][stu] > highest)
        {
            highest = gpa2[1][stu];
        }
    if(gpa2 [1][stu] < lowest)
        {
            lowest = gpa2[1][stu];
        }


    /*for (int z = 0; z < NUM_STUDENTS; z++)
    {

    }*/



    totalAvg = totalAvg + avg;
    //temp = (static_cast<int>( (avg + 0.005) * 100 ) ) / 100.0;


    cout << fixed << showpoint << setprecision(2);
    cout << setw(3) << stu+1 << setw(13) << avg << endl;
}



totalAvg = totalAvg / NUM_STUDENTS;
cout << "Avg of all students: " << totalAvg << endl;
cout << "Highest GPA: " << highest << endl;
cout << "Lowest GPA: " << lowest << endl;

}`

Answer 1

尝试假设您的第一个学生的AVERAGE最低 然后在第二个学生的所有学生上运行你的循环

我修复了你的代码，看看：

void averaging(double gpa [][NUM_QTRS], double gpa2[][QTR_NUM])
 {
double highest, lowest;
double totalAvg = 0;

highest = gpa2[0][0];

for(int i = 0; i < NUM_QTRS; i++)
    {
        total = total + gpa[0][i];

    }

    // calculate average gpa for 1 student
    avg = total / NUM_QTRS;


    //fill second row with GPA of each student

    gpa2[0][0] = 1;
    gpa2[1][0] = avg;

lowest = avg;

for (int stu = 1; stu < NUM_STUDENTS; stu++)
{
    double total = 0;
    double avg = 0;
    double temp;


    // sum up all gpas for 1 student
    for(int i = 0; i < NUM_QTRS; i++)
    {
        total = total + gpa[stu][i];

    }

    // calculate average gpa for 1 student
    avg = total / NUM_QTRS;


    //fill second row with GPA of each student

    gpa2[0][stu] = stu + 1;
    gpa2[1][stu] = avg;

    if(gpa2 [1][stu] > highest)
        {
            highest = gpa2[1][stu];
        }
    if(gpa2 [1][stu] < lowest)
        {
            lowest = gpa2[1][stu];
        }


    /*for (int z = 0; z < NUM_STUDENTS; z++)
    {

    }*/



    totalAvg = totalAvg + avg;
    //temp = (static_cast<int>( (avg + 0.005) * 100 ) ) / 100.0;


    cout << fixed << showpoint << setprecision(2);
    cout << setw(3) << stu+1 << setw(13) << avg << endl;
}



totalAvg = totalAvg / NUM_STUDENTS;
cout << "Avg of all students: " << totalAvg << endl;
cout << "Highest GPA: " << highest << endl;
cout << "Lowest GPA: " << lowest << endl;
} `