可以在GAMS中使用一段代码吗？

SETS
   i   'Products'   /p1*p3/
   j   'Resources'  /r1*r4/;

PARAMETERS
   profit(i)      'Profit for each product'
   capacity(j)    'Resource capacity';

TABLE profit(i)  capacity(j)
          r1      r2      r3      r4
   p1     10      0.2     0.3     0.4
   p2     12      0.1     0.2     0.5
   p3     15      0.3     0.1     0.2;

VARIABLES
   x(i)        'Amount of each product to produce'
   total_profit  'Total profit';

EQUATIONS
   resource(j)  'Resource constraint';

resource(j)..  sum(i, x(i) * profit(i,j)) =l= capacity(j);

MODEL linear_programming /all/;

SOLVE linear_programming USING LP MAXIMIZING total_profit;