显示来自具有一个公共点的两个数组的数据

def find_common_elements(arr1, arr2):
    arr1.sort()
    arr2.sort()
    result = []
    ptr1 = 0
    ptr2 = 0
    
    while ptr1 < len(arr1) and ptr2 < len(arr2):
        if arr1[ptr1] == arr2[ptr2]:
            result.append(arr1[ptr1])
            ptr1 += 1
            ptr2 += 1
        elif arr1[ptr1] < arr2[ptr2]:
            ptr1 += 1
        else:
            ptr2 += 1
    
    return result

# 示例用法
array1 = [1, 3, 5, 7, 9]
array2 = [2, 4, 5, 7, 8]
result = find_common_elements(array1, array2)
print(result)