比较3个数字并返回最大值

def find_max(a, b, c):
    if a >= b and a >= c:
        return a
    elif b >= a and b >= c:
        return b
    else:
        return c

# 示例调用
max_value = find_max(10, 20, 15)
print("最大值是:", max_value)

def find_max(a, b, c):
    # 数据类型检查
    if not (isinstance(a, (int, float)) and isinstance(b, (int, float)) and isinstance(c, (int, float))):
        raise ValueError("输入必须是数字")
    
    print(f"比较: {a}, {b}, {c}")  # 调试信息
    
    if a >= b and a >= c:
        return a
    elif b >= a and b >= c:
        return b
    else:
        return c

# 示例调用
max_value = find_max(10, 20, 15)
print("最大值是:", max_value)