Problem with Visual C++.NET

Code:

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#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string.h>
#include <ctime>
using namespace std;

int main()
{
int input;
 
  while (cout << "Enter a number: " && !(cin >> input))
  {
    cout << "\nInvalid input" <<endl;
    cin.clear();
    cin.ignore(std::numeric_limits < int >::max(), '\n');
  }
 
  cout <<"You entered " <<input;
return 0;
}

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This code example works in Dev C++ but not in Visual C++.NET. The error messages I get are:

Splicer.cpp(41) : error C2039: 'numeric_limits' : is not a member of 'std'
Splicer.cpp(41) : error C2065: 'numeric_limits' : undeclared identifier
Splicer.cpp(41) : error C2062: type 'int' unexpected

In any case I need to be able to trap the error if a user enters an illegal value into an integer variable (such as 'a" or "hahaha") while preventing the program from spiraling into the killer infinite loop.

if you type "123abc" your loop will not detect the "abc" part. The only way I know to do it is to use getline() and get the keyboard input as a string then parse the string for non-numeric characters. you could make a function out of that.

inlude <limits> to get std::numeric_limits

>> This code example works in Dev C++ but not in Visual C++.NET.
You need to #include <limits>, then it will compile and work. There is no need for <cstdlib>, <cstdio>, <ctime>, or <string.h> in that code, though.

>> if you type "123abc" your loop will not detect the "abc" part. The only way I know to do it is to use getline()
An easier way is to just change the while control to:

Code:

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while (cout << "Enter a number: " && (!(cin >> input) || cin.get() != '\n'))

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Basically that also causes the loop to be entered if the next character after the int is read in is not the end of the line.