Sort the strings based on their numeric values

[qazmlp]

I have got the following strings:
121721234567890
13
1217212345
129

Is it possible to do descending sort for these strings based on their
numeric values?

After sorting, they need to figure in this order:
121721234567890
1217212345
129
13

This seems to be bit difficult for me with std::sort().

Could you help?

[John Harrison]

"qazmlp" <qa********@rediffmail.com> wrote in message
news:db*************************@posting.google.co m...

I have got the following strings:
121721234567890
13
1217212345
129

Is it possible to do descending sort for these strings based on their
numeric values?

After sorting, they need to figure in this order:
121721234567890
1217212345
129
13

This seems to be bit difficult for me with std::sort().

Could you help?

Its as easy with std::sort as any other way. All you need to do is write a
function that compares based on the numeric value of the string, then you
can plug that function into std::sort

bool NumericGreaterThan(const std::string& lhs, const std::string& rhs)
{
...
}

std::sort(x.begin(), x.end(), NumericGreaterThan);

Of course writing NumericGreaterThan might be a bit of a challenge.

john

[Ed]

"John Harrison" <jo*************@hotmail.com> wrote:

Of course writing NumericGreaterThan might be a bit of a challenge.

bool NumericGreaterThan(const std::string& lhs, const std::string& rhs)
{
return atoi(lhs.cstr())>atoi(rhs.c_str());
}