输入10个学生5门课的成绩,分别用函数实现下列功能: ①计算每个学生的平均分; ②计算每门课的平均分; ③找出所有50个分数中最高的分数所对应的学生和课程; ④计算平均分方差: 其中,x:为某一学生的平均分。使用C++使用结构体,函数与指针
时间: 2024-01-01 10:04:44 浏览: 59
好的,我可以帮您解决这个问题。首先,我们可以定义一个结构体来存储学生的成绩信息:
```c++
struct student {
int scores[5];
float avg_score;
};
```
然后,我们可以定义一个函数来输入学生的成绩:
```c++
void input_scores(student* students, int num_students) {
for (int i = 0; i < num_students; i++) {
cout << "Enter scores for student " << i+1 << ": ";
for (int j = 0; j < 5; j++) {
cin >> students[i].scores[j];
}
}
}
```
接下来,我们可以定义一个函数来计算每个学生的平均分:
```c++
void calculate_avg_student_score(student* students, int num_students) {
for (int i = 0; i < num_students; i++) {
float sum = 0;
for (int j = 0; j < 5; j++) {
sum += students[i].scores[j];
}
students[i].avg_score = sum / 5;
}
}
```
然后,我们可以定义一个函数来计算每门课的平均分:
```c++
void calculate_avg_course_score(student* students, int num_students) {
float sum_scores[5] = {0};
for (int i = 0; i < num_students; i++) {
for (int j = 0; j < 5; j++) {
sum_scores[j] += students[i].scores[j];
}
}
for (int i = 0; i < 5; i++) {
cout << "Average score for course " << i+1 << " is: " << sum_scores[i] / num_students << endl;
}
}
```
接下来,我们可以定义一个函数来找出所有50个分数中最高的分数所对应的学生和课程:
```c++
void find_highest_score(student* students, int num_students) {
int max_score = 0;
int max_student = 0;
int max_course = 0;
for (int i = 0; i < num_students; i++) {
for (int j = 0; j < 5; j++) {
if (students[i].scores[j] > max_score) {
max_score = students[i].scores[j];
max_student = i+1;
max_course = j+1;
}
}
}
cout << "The highest score is " << max_score << " and it belongs to student " << max_student << " and course " << max_course << endl;
}
```
最后,我们可以定义一个函数来计算平均分方差:
```c++
void calculate_variance(student* students, int num_students) {
float sum = 0;
float sum_squared = 0;
for (int i = 0; i < num_students; i++) {
sum += students[i].avg_score;
sum_squared += pow(students[i].avg_score, 2);
}
float variance = sum_squared / num_students - pow(sum / num_students, 2);
cout << "The variance of the average scores is: " << variance << endl;
}
```
最后,我们可以在主函数中调用这些函数来完成整个程序:
```c++
int main() {
int num_students = 10;
student students[num_students];
input_scores(students, num_students);
calculate_avg_student_score(students, num_students);
calculate_avg_course_score(students, num_students);
find_highest_score(students, num_students);
calculate_variance(students, num_students);
return 0;
}
```
这样,我们就完成了这个程序。希望对您有所帮助!
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