Problem with Visual C++.NET

[SkyRaign]

#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;
}

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.

[Ancient Dragon]

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

[Daved]

>> 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:

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

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.