擅长:python、mysql、java
<p>我最后写了一些实用函数来完成这个任务。您可以按如下方式使用它们:</p>
<pre><code>auto x = range(10); // [0, ..., 9]
auto y = range(2, 20); // [2, ..., 19]
auto z = range(10, 2, -2); // [10, 8, 6, 4]
</code></pre>
<p>代码:</p>
<pre><code>#include <vector>
#include <stdexcept>
template <typename IntType>
std::vector<IntType> range(IntType start, IntType stop, IntType step)
{
if (step == IntType(0))
{
throw std::invalid_argument("step for range must be non-zero");
}
std::vector<IntType> result;
IntType i = start;
while ((step > 0) ? (i < stop) : (i > stop))
{
result.push_back(i);
i += step;
}
return result;
}
template <typename IntType>
std::vector<IntType> range(IntType start, IntType stop)
{
return range(start, stop, IntType(1));
}
template <typename IntType>
std::vector<IntType> range(IntType stop)
{
return range(IntType(0), stop, IntType(1));
}
</code></pre>