查找矩形区域中的百分比变化

给定两个整数P和Q ，它们表示矩形的长度和宽度的百分比变化，任务是打印矩形区域中的百分比变化。

例子：

Input: P = 10, Q = 20
Output: 32
Explanation:
Let the initial length of the rectangle be 100 and breadth be 80.
Initial area = 8000.
New length = 110 and new breadth = 96. Therefore, the new area = 10560.
The percentage change in the area = ((10560 – 8000) / 8000) * 100 = 32.

Input: P = 20, Q = -10
Output: 8
Let initial length of the rectangle be 100 and breadth be 80.
Initial area = 8000.
New length = 120 and new breadth = 72. Therefore, new area = 8640.
The percentage change in the area = ((8640 – 8000) / 8000) * 100 = 8.

方法：

• 由于矩形的面积由公式给出：

  area = length * breadth
  

• 假设矩形的初始长度为L ，矩形的宽度为B。因此，初始面积由L * B给出。
• 因此，新的长度和宽度为：

  L' = L + ((P/100)*L)
  B' = B + ((Q/100)*B)
  

• 因此，新的长度和宽度为：

  new area = [L + ((C/100)*L)] * [B + ( ( D / 100) * B)]

• 面积变化百分比由以下公式给出：

  
  % change = ((new area – old area) / old area )*100

  下面是上述方法的实现：

  C++

  // CPP implementation to find the percentage
  #include 
  using namespace std;
    
  // change in the area when the percentage change
  // in the length and breadth is given
    
  // Function to calculate percentage
  // change in area of rectangle
  int calculate_change(int length, int breadth){
      int change = 0;
      change = length + breadth+((length * breadth)/100);
      return change;
    }
    
  // Driver code
  int main()
  {
    int cL = 20;
    int cB = -10;
    int cA = calculate_change(cL, cB);
    
    printf("%d",cA);
    return 0;
  }

  Java

  // Java implementation to find the percentage
  import java.util.*;
    
  class GFG{
    
      // change in the area when the percentage change
      // in the length and breadth is given
    
      // Function to calculate percentage
      // change in area of rectangle
      static int calculate_change(int length, int breadth){
          int change = 0;
          change = length + breadth+((length * breadth)/100);
          return change;
      }
        
      // Driver code
      public static void main(String args[])
      {
          int cL = 20;
          int cB = -10;
          int cA = calculate_change(cL, cB);
            
          System.out.println(+ cA);
        
      }
  }
    
  // This code is contributed by AbhiThakur

  Python3

  # Python3 implementation to find the percentage
  # change in the area when the percentage change
  # in the length and breadth is given
    
  # Function to calculate percentage 
  # change in area of rectangle
  def calculate_change(length, breadth):
      change = 0
      change = length + breadth+((length * breadth)//100)
      return change
    
  # Driver code
  if __name__ == "__main__":
      cL = 20
      cB = -10
      cA = calculate_change(cL, cB)
    
      print(cA)
    
  # This code is contributed by mohit kumar 29

  C#

  // C# implementation to find the percentage
  using System;
  using System.Collections.Generic;
  using System.Linq;
    
  class GFG 
  {
        
  // change in the area when the percentage change
  // in the length and breadth is given
    
  // Function to calculate percentage
  // change in area of rectangle
  static int calculate_change(int length, int breadth){
      int change = 0;
      change = length + breadth + ((length * breadth)/100);
      return change;
  }
    
  // Driver Code
  public static void Main(String[] args) 
  {
      int cL = 20;
      int cB = -10;
      int cA = calculate_change(cL, cB);
        
      Console.Write(cA);
  }
  }
    
  // This code is contributed by shivanisinghss2110

  输出：

  8
  

  时间复杂度： O(1)