程序代码：

// g++ -Wall -fomit-frame-pointer -funroll-loops -Ofast -msse4.2 -mavx -std=c++11 a.cpp -lm -o a

#include <iostream>
#include <vector>

using std::cout;
using std::cin;
using std::endl;
using std::vector;

int main(void)
{
    vector<int> nums = {1, 3, 5, 7, 9, 11, 13, 15};
    for (auto i : nums)
        for (auto j : nums)
            for (auto k : nums)
                if (i + j + k == 30)
                    cout << i << " + " << j << " + " << k << " = 30." << endl;
    return 0;
}

程序代码：

(setq nums '(1 3 5 7 9 11 13 15))

(loop for i in nums do
      (loop for j in nums do
        (loop for k in nums do
          (if (= 30 (+ i j k))
              (message "%d + %d + %d = 30" i j k)))))