problem with library limits

[chulio]

Hello,

i have this code:

#include <iostream>
#include <limits>
#include <stdio.h>

#define INF numeric_limits<int>::max();

using namespace std;

int main(void){
    int matrix[2][2] = {INF,INF
                       INF, INF};
    
    
    for(int i=0;i<2;i++){
            cout << "\n";
            for(int j=0;j<2;j++)
                    cout << matrix[i][j] << " ";
    }
    system("PAUSE");
    return 0;
}

i receive errors from the compiler. But when i replace in lines 10 and 11, INF to numeric_limits<int>::max() i receive No errors from the compiler. Any idea how to solve it ?

Thanks.

[Moschops]

This

    int matrix[2][2] = {INF,INF
                       INF, INF};

becomes this

    int matrix[2][2] = {numeric_limits<int>::max();,numeric_limits<int>::max();
                       numeric_limits<int>::max();, numeric_limits<int>::max();};

Look at all those semi-colons. That's just bad news for everyone.

[PanGalactic]

#define is bad news for everyone. Make a constant instead.

const int INF = ...;

And avoid#define except where absolutely, 100% required.

[chulio]

First of all, thanks for the replies.

Actually it is quite annoying to write :

  int matrix[2][2] = {numeric_limits<int>::max();,numeric_limits<int>::max();
                       numeric_limits<int>::max();, numeric_limits<int>::max();};

i mean that if we have a matrix with size 30*30 its terrible.

i tried

const int INF = numeric_limits<int>::max();

but it is not working. Actually, what am i looking is to determine a number as +infinite. Is there any other better or elegant way to do it ?

Thanks.

[Moschops]

If you write

int matrix[2][2] = {numeric_limits<int>::max();,numeric_limits<int>::max();
                       numeric_limits<int>::max();, numeric_limits<int>::max();};

it won't compile. The problem is that your line

#define INF numeric_limits<int>::max();

has a semi-colon on the end. If you removed that, it would have worked.

[chulio]

yes, if we write this:

#include <iostream>
#include <limits>
#include <stdio.h>

#define INF numeric_limits<int>::max();

using namespace std;

int main(void){
int matrix[2][2] = {numeric_limits<int>::max(),numeric_limits<int>::max(),
                       numeric_limits<int>::max(), numeric_limits<int>::max()};
    
    for(int i=0;i<2;i++){
            cout << "\n";
            for(int j=0;j<2;j++)
                    cout << matrix[i][j] << " ";
    }
    system("PAUSE");
    return 0;
}

its ok with no compile errors.

So, is there any other way i can write +inf in order to avoid the

numeric_limits<int>::max()

when i initialize my matrix? or is there any other way i can have +inf ?

[Moschops]

#include <iostream>
#include <limits>
#include <stdio.h>


using namespace std;
const int INF = numeric_limits<int>::max();

int main(void){
  int matrix[2][2] = {INF, INF, INF, INF};
    
    for(int i=0;i<2;i++){
            cout << "\n";
            for(int j=0;j<2;j++)
                    cout << matrix[i][j] << " ";
    }
    return 0;
}

<cmath> might contain the floating point value INFINITY