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airekans/string_rotate_left.cpp

Created May 15, 2015 02:56
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Code snippet that help me understand std::rotate
Raw
string_rotate_left.cpp
// A reference to the idea is here: http://en.cppreference.com/w/cpp/algorithm/rotate
// Actually its idea is recursion, as shown as follow:
void str_rotate(char* first, char* middle, char* last)
{
char* next = middle;
while (first != middle && next != last)
{
std::iter_swap(first++, next++);
}
if (first == middle && next == last)
{
return;
}
else if (first == middle)
{
str_rotate(first, next, last);
}
else // next == last
{
str_rotate(first, middle, last);
}
}
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