Re: XCode, cin and string (C++) => troubles :s
Re: XCode, cin and string (C++) => troubles :s
- Subject: Re: XCode, cin and string (C++) => troubles :s
- From: Andreas Grosam <email@hidden>
- Date: Sun, 14 Feb 2010 14:01:23 +0100
On Feb 14, 2010, at 12:38 PM, Arnaud Schoofs wrote: #include <iostream>
using namespace std;
int main (int argc, char * const argv[]) {
string s;
cout << "Type something (using string) : ";
cin >> s;
cout << s << "\n\n";
char* c;
cout << "Type something (using char*) : ";
cin >> c;
cout << c << "\n\n";
return 0;
}
Your pointer to char c is not initialized, nor does it point to a reasonable buffer. So, cin writes *somewhere* into memory. That it crashes is normal ;)
Anyway, using a pointer to a char as input buffer isn't a reasonable way to go.
Furthermore, the pattern
std::cin >> some_variable
is frequently causing troubles, when the details about an istream are not fully understood. For instance,
std::string str; std::cin >> str;
is completely inappropriate to read a "string" (that is input) from the console.
Please read this article for further information:
Regards Andreas |
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