检查两条直线是否平行

给定两条直线(a1，b1，c1)和(a2，b2，c2)的等式，使得(ai，bi，ci)分别是X ²的系数， X和直线的常数项方程$a_{i}x^{2} + b_{i}x + c$ ，任务是检查两条直线是否平行。如果发现它们是平行的，则打印“是” 。否则，打印“否” 。

例子：

Input: a1 = -2, b1 = 4, a2 = -6, b2 = 12
Output: Yes
Explanation:
The slope of both lines are equal i.e., a1/b1 = a2/ b2 = -2.

Input: a1 = 11, b1 = 3, a2 = 7, b2 = -10
Output: No
Explanation: 
The slope of both lines are not equal i.e., a1/b1≠ a2/b2.

方法：要检查两条线是否彼此平行，其思想是比较给定线的斜率。如果给定线的斜率相等，则给定线是平行的。因此，打印“是”，否则打印“否” 。

下面是上述方法的实现：

C++

// C++ program for the above approach
#include 
using namespace std;
 
// Function to check if two lines
// are parallel or not
void parallel(float a1, float b1,
              float c1, float a2,
              float b2, float c2)
{
    // If slopes are equal
    if ((-(a1 / b1)) == (-(a2 / b2))) {
        cout << "Yes";
    }
    else {
        cout << "No";
    }
}
 
// Driver Code
int main()
{
    float a1 = -2, b1 = 4, c1 = 5;
    float a2 = -6, b2 = 12, c2 = 6;
 
    // Function Call
    parallel(a1, b1, c1, a2, b2, c2);
 
    return 0;
}

Java

// Java program to implement
// the above approach
import java.util.*;
class GFG
{
 
// Function to check if two lines
// are parallel or not
static void parallel(float a1, float b1,
              float c1, float a2,
              float b2, float c2)
{
   
    // If slopes are equal
    if ((-(a1 / b1)) == (-(a2 / b2)))
    {
        System.out.println("Yes");
    }
    else
    {
         System.out.println("No");
    }
}
 
// Driver Code
public static void main(String args[])
{
    float a1 = -2, b1 = 4, c1 = 5;
    float a2 = -6, b2 = 12, c2 = 6;
 
    // Function Call
    parallel(a1, b1, c1, a2, b2, c2);
}
}
 
// This code is contributed by splevel62.

Python3

# Python program to implement
# the above approach
 
 
# Function to check if two lines
# are parallel or not
def parallel(a1, b1, c1, a2, b2, c2):
   
    # If slopes are equal
    if ((-(a1 / b1)) == (-(a2 / b2))):
        print("Yes");
    else:
        print("No");
 
# Driver Code
if __name__ == '__main__':
    a1 = -2; b1 = 4; c1 = 5;
    a2 = -6; b2 = 12; c2 = 6;
 
    # Function Call
    parallel(a1, b1, c1, a2, b2, c2);
 
# This code is contributed by 29AjayKumar

C#

// C# program to implement
// the above approach
using System;
class GFG
{
   
// Function to check if two lines
// are parallel or not
static void parallel(float a1, float b1,
              float c1, float a2,
              float b2, float c2)
{
   
    // If slopes are equal
    if ((-(a1 / b1)) == (-(a2 / b2)))
    {
        Console.Write("Yes");
    }
    else
    {
         Console.Write("No");
    }
}
 
// Driver Code
public static void Main()
{
    float a1 = -2, b1 = 4, c1 = 5;
    float a2 = -6, b2 = 12, c2 = 6;
 
    // Function Call
    parallel(a1, b1, c1, a2, b2, c2);
}
}
 
// This code is contributed by susmitakundugoaldanga.

输出：

Yes

时间复杂度： O(1)
辅助空间： O(1)