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#include <iostream>
#include <sstream>
using namespace std;
int main(size_t argc, char **argv)
{
istringstream in(argv[1]);
size_t idx;
size_t toRemove = 0;
while (in >> idx)
{
++toRemove;
argv[idx] = 0;
in.seekg(1, ios::cur);
}
for
(
char **empty = argv, **end = empty + argc;
empty != end; /* walk along all elements */
++empty
)
{
if (*empty) /* next element if non-empty */
{
cout << "In use: " << *empty << endl;
continue;
}
char **used = empty + 1; /* beyond the empty one: find used */
for (; used != end && *used == 0; ++used)
; /* find the next one in use */
if (used == end) /* at the end */
break;
*empty = *used; /* swap `used' and `empty' */
*used = 0;
}
argc -= toRemove;
for (size_t idx = 0; idx < argc; ++idx)
cout << idx << ": " << *argv++ << endl;
return 0;
}
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