1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5

#include <iostream>
using namespace std;

int main()
{
    int size=1;
    cout << "enter an array size: ";
    cin >> size; cout << '\n';

    myArray(size);

    // disregard next two lines: stops program from flashing closed
    int c=9;
    cin>>c;
}

void myArray(int sizex)
{
    // fill array
    int a[sizex][sizex];
    for(int i=1; i<sizex; i++)
    {
        for(int j=1; j<sizex; j++)
        {
            if(j%1==0)
                a[i][j] = i;
            else
                a[i][j] = j;
        }
    }

    // print array
    int n=1;
    for(int i=1; i<6; i++)
    {
        for(int j=1; j<6; j++)
        {
            cout << a[i][j];
            if((n % 5) == 0 )
                cout << "\n";
            else
                cout << ' ';
            n++;
        }
    }
}

  #include<iostream>
 
using namespace std;
 
void printarray(int);
 
int main()
{
    int num;
    cout<<"enter a number\n";
    cin>>num;
    printarray(num);
    return 0;
}
 
void printarray(int n)
{
    int array[n][n];
 
    for(int x=0, i=1; x<n; x++, i++)
    {
        for(int y=0; y<n; y++)
        {
            array[x][y]=i;
        }
    }
 
    for(int y=0; y<n; y++)
    {
        for(int x=0; x<n; x++)
        {
            cout<<array[x][y];
        }
        cout<<"\n";
    }
}

1>------ Build started: Project: TestProj, Configuration: Debug Win32 ------
1>Compiling...
1>source.cpp
1>d:\documents and settings\owner\my documents\visual studio 2005\projects\testprojexe\testproj\source.cpp(14) : error C2057: expected constant expression
1>d:\documents and settings\owner\my documents\visual studio 2005\projects\testprojexe\testproj\source.cpp(14) : error C2466: cannot allocate an array of constant size 0
1>d:\documents and settings\owner\my documents\visual studio 2005\projects\testprojexe\testproj\source.cpp(14) : error C2057: expected constant expression
1>d:\documents and settings\owner\my documents\visual studio 2005\projects\testprojexe\testproj\source.cpp(14) : error C2466: cannot allocate an array of constant size 0
1>d:\documents and settings\owner\my documents\visual studio 2005\projects\testprojexe\testproj\source.cpp(14) : error C2087: 'array' : missing subscript
1>d:\documents and settings\owner\my documents\visual studio 2005\projects\testprojexe\testproj\source.cpp(14) : error C2133: 'array' : unknown size

main(){
int **myArray; // a run-time sized 2d has trickier initialization syntax
int c, r; // number of columns and rows for our array
 
cout << "Simple Two Dimensional Array Demo" << endl;
cout << "Enter number of columns:"; cin >> c;
cout << "Enter number of rows:"; cin >> r; cout << endl;
 
// initialize a run-time sized two dimensional array
myArray = new int*[r]; // create first dimension (of pointers to 2nd dimension)
for (int i=0; i<r; i++){
myArray[i] = new int[c]; // create second dimension(s) 
}
 
// assign test values
for(int i=0; i<r; i++)
for(int j=0; j<c; j++)
myArray[i][j] = i*j;
 
print2dArray(myArray, c, r);
}