我無法找到二維數組中最低的AVG！ （最高AVG工作）

Question

我無法在二維數組中找到最低平均值，找到最高的AVG作品，但在查找最低值時我收到了垃圾數據。 這裏是我的功能： 我發現儘可能最低=最高，但我沒有修復解決方案。我知道問題可能在最低處初始化爲[0] [[0]，所以你找不到一個小於[0] [0]的值。任何幫助？

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

嘗試，認爲你的第一個學生有最低的AVG ，然後對所有從第二個

我固定的代碼學生運行循環，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; 
} `