We+all+know+that+1+++2+++3+...+++n+=+n+(n++1)/+2+.+Now+your+task+is+sim-+ply+to+get+this+n+(n+++1)+/
时间: 2023-11-14 10:08:01 浏览: 43
根据题目,我们可以得到以下式子:1+2+3+...+n = n(n+1)/2。因此,n(n+1)的值就是2*(1+2+3+...+n)。所以,要求n(n+1)的值,只需要输入n的值,然后计算2*(1+2+3+...+n)即可。
以下是C++的代码示例:
```c++
#include <iostream>
using namespace std;
int main() {
int n;
cin >> n;
int sum = n * (n + 1);
cout << sum << endl;
return 0;
}
```
相关问题
. A Pythagorean triplet is a set of three natural numbers, 0 < a < b < c, for which, a² + b² = c². For example, 3² + 4² = 9 + 16 = 25 = 5², so (3,4,5) is a Pythagorean triplet. Write a function void pyTriplet(int n). The function should print all Pythagorean triplets for which a + b + c = n. It should run in time O(n²)
Sure, I can help you with that. Here's an implementation of the `pyTriplet` function in C++ that prints all Pythagorean triplets for which a + b + c = n and runs in O(n²) time complexity:
```cpp
#include <iostream>
void pyTriplet(int n) {
for (int a = 1; a < n; a++) {
for (int b = a + 1; b < n; b++) {
int c = n - a - b;
if (c > 0 && a * a + b * b == c * c) {
std::cout << "(" << a << "," << b << "," << c << ")" << std::endl;
}
}
}
}
```
In this code, we use two nested loops to generate all possible values of `a` and `b`. We calculate `c` as the difference between `n`, `a`, and `b`. Then, we check if `c` is positive and if `a² + b² = c²`. If the conditions are met, we print the triplet `(a, b, c)`. Note that this implementation assumes that `n` is greater than 2.
You can call this function from your main program like this:
```cpp
int main() {
int n = 12; // example value of n
pyTriplet(n);
return 0;
}
```
This will print all Pythagorean triplets for `n = 12` that satisfy the condition `a + b + c = n`.
I hope this helps! Let me know if you have any further questions.
Write a critique on the cliche praises of feminine beauty that you know of.
The cliche praises of feminine beauty that are commonly used in our society are often superficial and narrow-minded. These praises focus solely on physical appearance and fail to acknowledge the multifaceted nature of a woman's beauty.
One of the most common cliche praises is the emphasis on a woman's physical attributes, such as her figure, complexion, and hair. While these features may be aesthetically pleasing, they do not define a woman's beauty. Beauty is not limited to one's physical appearance and should encompass their personality, intelligence, and inner strength.
Another cliche praise is the idea that a woman's beauty is directly related to her youthfulness. This notion is harmful and perpetuates ageism, suggesting that older women are less beautiful. However, beauty transcends age and is not limited to one's youthful appearance.
Additionally, many cliches focus on comparing women to unrealistic standards of beauty, such as supermodels or actresses. This creates an unattainable ideal and can lead to feelings of inadequacy and low self-esteem. It is important to celebrate all types of beauty and recognize that everyone is unique and beautiful in their own way.
In conclusion, the cliche praises of feminine beauty that are commonly used in our society are limiting and fail to recognize the full spectrum of a woman's beauty. We should strive to celebrate diversity and individuality and move away from superficial and narrow-minded ideals of beauty.
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