코드 분석

public class Test2 {

public static void main(String[] args) {

int[][] mathScores = new int[2][3];

 

mathScores[0][0] = 80;

mathScores[0][1] = 70;

mathScores[0][2] = 62;

mathScores[1][0] = 81;

mathScores[1][1] = 100;

mathScores[1][2] = 78;

 

for (int i = 0; i < mathScores.length; i++) {

for (int k = 0; k < mathScores[i].length; k++) {

 

System.out.println("mathScores[" + i + "][" + k + "]:" + mathScores[i][k]);

}

}

System.out.println();

 

int totalStudent = 0;

int totalMathSum = 0;

for (int i = 0; i < mathScores.length; i++) {

totalStudent += mathScores[i].length;

for (int k = 0; k < mathScores[i].length; k++) {

totalMathSum += mathScores[i][k];

}

}

 

double totalMathAvg = (double) totalMathSum / totalStudent;

System.out.println("전체 학생의 수학 평균 점수:" + totalMathAvg);

System.out.println();

 

int[][] englishScores = new int[2][];

englishScores[0] = new int[2];

englishScores[1] = new int[3];

 

englishScores[0][0] = 90;

englishScores[0][1] = 91;

englishScores[1][0] = 92;

englishScores[1][1] = 93;

englishScores[1][2] = 94;

 

for (int i = 0; i < englishScores.length; i++) {

for (int k = 0; k < englishScores[i].length; k++) {

System.out.println("englishScores[" + i + "][" + k + "]:" + englishScores[i][k]);

}

}

 

System.out.println();

 

totalStudent = 0;

int totalEnglishSum = 0;

for (int i = 0; i < englishScores.length; i++) {

totalStudent += englishScores[i].length;

for (int k = 0; k < englishScores[i].length; k++) {

totalEnglishSum += englishScores[i][k];

}

}

double totalEnglishAvg = (double) totalEnglishSum / totalStudent;

System.out.println("전체 학생의 영어 평균 점수:" + totalEnglishAvg);

 

}

}