使用swift语言统计学生的考试成绩：输入n个学生，要求统计每个学生安卓应用开发、IOS应用开发、Web前端程序设计的平均、最高、最低成绩，以及打印出每个学生的各科成绩。

以下是一个简单的实现，假设每个学生只有三门课程：

struct Student {
    var name: String
    var androidScore: Double
    var iosScore: Double
    var webScore: Double
    
    var averageScore: Double {
        return (androidScore + iosScore + webScore) / 3
    }
    
    var highestScore: Double {
        return max(androidScore, iosScore, webScore)
    }
    
    var lowestScore: Double {
        return min(androidScore, iosScore, webScore)
    }
    
    func printScores() {
        print("\(name): Android - \(androidScore), iOS - \(iosScore), Web - \(webScore)")
    }
}

func calculateScores() {
    print("Enter number of students:")
    guard let numberOfStudents = Int(readLine()!) else {
        print("Invalid input")
        return
    }
    
    var students = [Student]()
    
    for i in 1...numberOfStudents {
        print("Enter name for student \(i):")
        guard let name = readLine() else {
            print("Invalid input")
            return
        }
        
        print("Enter Android score for \(name):")
        guard let androidScore = Double(readLine()!) else {
            print("Invalid input")
            return
        }
        
        print("Enter iOS score for \(name):")
        guard let iosScore = Double(readLine()!) else {
            print("Invalid input")
            return
        }
        
        print("Enter Web score for \(name):")
        guard let webScore = Double(readLine()!) else {
            print("Invalid input")
            return
        }
        
        let student = Student(name: name, androidScore: androidScore, iosScore: iosScore, webScore: webScore)
        students.append(student)
    }
    
    for student in students {
        print("Name: \(student.name)")
        print("Average Score: \(student.averageScore)")
        print("Highest Score: \(student.highestScore)")
        print("Lowest Score: \(student.lowestScore)")
        student.printScores()
        print()
    }
}

calculateScores()

这段代码首先要求输入学生数量，然后循环读取每个学生的姓名和成绩，并将每个学生存储在一个 `Student` 结构体中。最后，它循环遍历所有学生，计算并打印每个学生的平均、最高和最低分数，以及打印每个学生的各科成绩。