成绩总数除以总个数算平均数
Topic source
double sum=0,people_num=0;
for(int i=0;i<scores.length;i++){
for(int j=0;j<scores[i].length;j++){
sum+=scores[i][j];
people_num++;
}
}
double average = 0;
average=sum/people_num;
System.out.println(average);
- 1
double sum=0,people_num=0;
for(int i=0;i<scores.length;i++){
for(int j=0;j<scores[i].length;j++){
sum+=scores[i][j];
people_num++;
}
}
double average = 0;
average=sum/people_num;
System.out.println(average);
小kai天天要抱咩咩咩
// 用二维数组表示的学生成绩:
int[][] scores = {
{ 82, 90, 91 },
{ 68, 72, 64 },
{ 95, 91, 89 },
{ 67, 52, 60 },
{ 79, 81, 85 },
};
double average = 0;
//分数的个数
int count =0;
//总分
double sum=0;
for (int i=0;i<scores.length;i++){
//算总数(sum)的时候顺便算出个数（count）
for (int j=0;j< scores[i].length;j++,count ++){
sum= sum+ scores[i][j];
}
}
//总分除以总个数
average=sum/count;
System.out.println(average);