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C++: Getting Input Gauranteed not to Overflow Buffer

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How can I get input into a buffer from standard input that will be gauranteed not to overflow my allocated memory? What function can I use? Thanks

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do
{
// tell user thats to big
// re-ask for input
// take input
}while(strlen(userinput) <= MAX_ALLOCATED);

using strlen u can check length of a "string" assuming thats what your doing?
or just use strncpy(...) then u can define the number of characters to copy >.<

[edited by - DevLiquidKnight on February 22, 2004 2:05:35 AM]

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A line:


#include <iostream>
#include <string>

int main()
{
std::string str;
std::getline(std::cin, str);
}


All of standard input until it gets closed:


#include <iostream>
#include <iterator>
#include <string>

int main()
{
std::string str( std::istreambuf_iterator<char>(std::cin),
std::istreambuf_iterator<char>() );
}


C++ container classes like std::string and std::vector are intended to grow as needed.


“Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.”
— Brian W. Kernighan (C programming language co-inventor)


[edited by - Fruny on February 22, 2004 2:12:57 AM]

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