Strange problem with std::string

Hi,

I am having a very strange problem with std::string. Here's the code:

Code:

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char temp[100];
gets(temp);
printf("%s\n", temp);
string t(temp);

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I did "using namespace std;", and now

Code:

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string t(temp)

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is not working. Any ideas? My input was "lee".

Thanks.

How is it not working? Post a full program.

Also note that gets is a function that you shouldn't use, since it is impossible to prevent buffer overruns with it, and that you can get input directly to a std::string much more safely and conveniently.

Here is a more complete code (all those relevant, even some I don't think might be relevant):

Code:

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  vector<string> name;
  vector<string> problem;
  vector<int> score;
  int n, p;

  scanf("%d", &n);
  for(int c = 0; c < n; c++){
      char temp[255];
      gets(temp);
      gets(temp);
      printf("%s\n", temp);
      string t(temp);
      printf("a\n");
      name.push_back(t);
      printf("a\n");
      score.push_back(0);
      printf("a\n");
  }

---

I actually also tried directly cin >> t, but not working...

Your problem appears to be having two gets calls in the loop. The first time through the loop the first gets extracts an unread newline left by scanf, but next times both calls to gets want input from the user.

With iostream getting this input looks like this:

Code:

---

...
#include <limits>
int main() {
    ...
    cin >> n;
    cin.ignore(numeric_limits<streamsize>::max(), '\n'); //throw away all unread characters
    for (...) {
        string t;
        getline(cin, t);
        ...
    }
}

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Somehow Dev-C++ isn't having <limits>... What can I do? Can anyone send me the .h and the .o?

Upgrade to an IDE that has seen development in the last 10 years.

Dev-C++ is convenient (and used in OI here in Hong Kong, so I better not change). Does anyone have the .h and .o for <limits> (I guess it isn't copyrighted?)?

I can't believe it doesn't have this header. However, you can also use a large number or

Code:

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cin.ignore(cin.rdbuf()->in_avail(), '\n');

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runtime error... somehow, I can't even execute:

Code:

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string temp("abc");

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I believe this is happening just after an automatic update from Microsoft on my XP last night... Strange...

Quote:

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Originally Posted by jasperleeabc

Dev-C++ is convenient (and used in OI here in Hong Kong, so I better not change). Does anyone have the .h and .o for <limits> (I guess it isn't copyrighted?)?

---

???

The other MinGW IDE choice is Code::Blocks. I don't see how Dev-C++ is any more *convenient*. Both IDE's work on the same simple premise: text editor + makefile (and it doesn't get much more convenient/simpler than that).

But seriously, heed the advice given, and make the switch.