详解Python如何检查一个数字是否是三态数

def is_triangular_number(num):
    total = 0
    n = 1
    while total < num:
        total += n
        if total == num:
            return True
        n += 1
    return False

# 检查一个数字是否是三态数
def is_triangular_number(num):
    total = 0
    n = 1
    while total < num:
        total += n
        if total == num:
            return True
        n += 1
    return False

# 测试示例
test_numbers = [1, 3, 6, 10, 15, 21, 22, 25]

for num in test_numbers:
    if is_triangular_number(num):
        print(f"{num} 是三态数")
    else:
        print(f"{num} 不是三态数")

def search_triangular_number(target):
    total = 0
    n = 1
    while total < target:
        total += n
        if total == target:
            return True
        n += 1
    return False

# 示例：在三态数序列中搜索目标数字
target_numbers = [6, 10, 15, 21]

for num in target_numbers:
    if search_triangular_number(num):
        print(f"{num} 存在于三态数序列中")
    else:
        print(f"{num} 不在三态数序列中")

class TriangularIndex:
    def __init__(self, size):
        self.index = [n * (n + 1) // 2 for n in range(size)]

    def contains(self, target):
        return target in self.index

# 示例：使用三态数索引结构
index = TriangularIndex(10)

target_numbers = [6, 10, 15, 21]

for num in target_numbers:
    if index.contains(num):
        print(f"{num} 存在于三态数索引结构中")
    else:
        print(f"{num} 不在三态数索引结构中")

def is_triangular_number(num):
    total = 0
    n = 1
    while total < num:
        total += n
        if total == num:
            return True
        n += 1
    return False

# 编程练习：检查一系列数字是否是三态数
numbers_to_check = [28, 36, 45, 55]

for num in numbers_to_check:
    if is_triangular_number(num):
        print(f"{num} 是三态数")
    else:
        print(f"{num} 不是三态数")