#include<iostream>
#include<stdlib.h>
#include<time.h>
using namespace std;  // needed for cout function

int main(void)  // Must be int
{
    int i,j;        // moved these here while debugging
typedef char seats[30];
seats student[5][5] = 
                    {"Alan","Ronaldo","pato","kaka","ronaldinho",
                    "c ronaldo","cole","drogba","rivaldo","romario",
                    "eduardo","affelay","nani","anderson","scholes",
                    "clichey","kalou","deco","robinho","robben",
                    "fabregas","ferdinand","anton","belletti","anelka"};
// You didn't need all the brackets.

for(i = 0;i<5; i++){
for(j = 0; j<5; j++){  // You have for (j=0, instead of ;
cout<< student[i][j]<<"\t";
}
}
cout<<endl;
  system ("Pause");  // added a pause so you could see the display
  }

for(int i = 0;i<=5; i++)
{
for(int j = 0,j<=4; j++)
{
cout<< student[i][j]<<"\t";
}
}
cout<<endl;
  }

#include <iostream>
#include <iomanip>

using namespace std;

int main ()
{
    cout << setw(15) << "Hello world!" << endl;

    system("pause");
    return EXIT_SUCCESS;
}