编写程序输出n以内最大的10个素数及其之和;如果n以内最大素数不足10个,则按照实际个数输出。 输入格式: 输入n的值。 输出格式: 在第一行中输出最大的10个素数,每个素数后面有个空格。在第二行中输出10个素数之和。
时间: 2024-11-27 08:15:22 浏览: 43
为了编写程序输出给定范围内的最大10个素数以及它们的和,你可以采用以下步骤:
1. 定义一个函数来判断是否为素数:
```python
def is_prime(num):
if num < 2:
return False
for i in range(2, int(num**0.5) + 1):
if num % i == 0:
return False
return True
```
2. 获取用户输入的n值,并初始化一个列表存储找到的最大素数和一个计数器:
```python
n = int(input("请输入n的值: "))
primes = []
count = 0
total_sum = 0
```
3. 使用while循环查找并添加素数,直到找到10个或达到n的上限:
```python
while count < 10 and len(primes) < n:
next_num = primes[-1] + 1 if primes else 2
if is_prime(next_num):
primes.append(next_num)
total_sum += next_num
count += 1
```
4. 输出结果:
```python
print(f"最大的{len(primes)}个素数: {', '.join(map(str, primes))}")
print(f"它们的和: {total_sum}")
```
如果你想要输出小于n的所有素数(而非仅前10个),只需移除`count < 10`这个条件即可。
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