用于根据排名计算学生百分比的程序

给定学生的排名和参加考试的学生总数，任务是找到学生的百分位数。

The percentile of a student is the % of the number of students having marks less than him/her.

例子：

Input: Rank: 805, Total Number of Students Appeared: 97481 
Output: 99.17 
Explaination: 
((97481 – 805) / 97481) * 100 = 99.17
Input: Rank: 65, Total Number of Students Appeared: 100 
Output: 35 
Explaination: 
((100 – 65) / 100) * 100 = 35 
 

方法
给出学生排名和学生总数出现时的百分比计算公式为：

((Total Students – Rank) / Total Students) * 100

下面是上述公式的实现：

C++

C++

// C++ program to calculate Percentile
// of a student based on rank
 
#include 
using namespace std;
 
// Program to calculate the percentile
float getPercentile(int rank, int students)
{
    // flat variable to store the result
    float result = float(students - rank)
                / students * 100;
 
    // calculate and return the percentile
    return result;
}
 
// Driver Code
int main()
{
    int your_rank = 805;
    int total_students = 97481;
 
    cout << getPercentile(
        your_rank, total_students);
}

Java

// Java program to calculate Percentile
// of a student based on rank
import java.util.*;
 
class GFG{
  
// Program to calculate the percentile
static float getPercentile(int rank, int students)
{
    // flat variable to store the result
    float result = (float)(students - rank)
                   / students * 100;
  
    // calculate and return the percentile
    return result;
}
  
// Driver Code
public static void main(String[] args)
{
    int your_rank = 805;
    int total_students = 97481;
  
    System.out.print(getPercentile(
        your_rank, total_students));
}
}
 
// This code is contributed by Princi Singh

Python3

# Python3 program to calculate Percentile
# of a student based on rank
 
# Program to calculate the percentile
def getPercentile(rank, students) :
 
    # flat variable to store the result
    result = (students - rank) / students * 100;
 
    # calculate and return the percentile
    return result;
 
# Driver Code
if __name__ == "__main__" :
 
    your_rank = 805;
    total_students = 97481;
 
    print(getPercentile(your_rank, total_students));
 
# This code is contributed by Yash_R

C#

// C# program to calculate Percentile
// of a student based on rank
using System;
 
class GFG{
   
// Program to calculate the percentile
static float getPercentile(int rank, int students)
{
    // flat variable to store the result
    float result = (float)(students - rank)
                   / students * 100;
   
    // calculate and return the percentile
    return result;
}
   
// Driver Code
public static void Main(String[] args)
{
    int your_rank = 805;
    int total_students = 97481;
   
    Console.Write(getPercentile(
        your_rank, total_students));
}
}
 
// This code is contributed by Princi Singh

Javascript

 
// JavaScript program to calculate Percentile
// of a student based on rank
 
    // Program to calculate the percentile
    function getPercentile(rank , students)
    {
        // flat variable to store the result
        var result =  (students - rank) / students * 100;
 
        // calculate and return the percentile
        return result;
    }
 
    // Driver Code
     
        var your_rank = 805;
        var total_students = 97481;
 
        document.write(getPercentile(your_rank, total_students).toFixed(4));
 
// This code contributed by aashish1995
 

输出：

99.1742

性能分析：

• 时间复杂度：在上述方法中，我们能够使用公式在恒定时间内计算百分位数，因此时间复杂度为O(1) 。
• 辅助空间复杂度：在上述方法中，除了几个恒定大小的变量之外，我们没有使用任何额外的空间，因此辅助空间复杂度为O(1) 。