"计算所有学生的平均分"

public class Main{

public static void main(String[]args){

int[][]scores={

{82,90,91},

{68,72,64},

{95,91,89},

{67,52,60},

{79,81,85},

};

double average=0;

double sum=0;

for(int[]ns:scores){

for(int n:ns){sum=sum+n;}

average=sum/3;

System.out.printf("average:%.2f\n",average);

sum=0;

}

}

}