/* ECP: FILEname=fig1_3.c */
/* 1*/   #include <stdio.h>

/* 2*/   unsigned long int
/* 3*/   Factorial( unsigned long int N )
/* 4*/   {
/* 5*/       int i;
/* 6*/       unsigned long int Answer = 1;

/* 7*/       for( i = 1; i <= N; i++ )
/* 8*/           Answer *= i;

/* 9*/       return Answer;
/*10*/   }

/*11*/   main( void )
/*12*/   {
/*13*/       int i;
/*14*/       const int MaxNum = 12;

/*15*/       printf( " N      N!\n" );
/*16*/       for( i = 0; i <= MaxNum; i++ )
/*17*/           printf( "%2d %10lu\n", i, Factorial( i ) );

/*18*/       return 0;
/*19*/   }