第1个回答 2016-12-11
少年，用专业的数学规划软件吧，比如说lingo。
! The code is about PILP;
MAX=X-2*Y;
X>=1;X<=2;
Y>=3;Y<=4;
@GIN(X);@GIN(Y);
答案在这里哦！
Global optimal solution found.
Objective value: -4.000000
Objective bound: -4.000000
Infeasibilities: 0.000000
Extended solver steps: 0
Total solver iterations: 0
Elapsed runtime seconds: 0.64
Model Class: PILP
Total variables: 2
Nonlinear variables: 0
Integer variables: 2
Total constraints: 5
Nonlinear constraints: 0
Total nonzeros: 6
Nonlinear nonzeros: 0
Variable Value Reduced Cost
X 2.000000 -1.000000
Y 3.000000 2.000000
Row Slack or Surplus Dual Price
1 -4.000000 1.000000
2 1.000000 0.000000
3 0.000000 0.000000
4 0.000000 0.000000
5 1.000000 0.000000本回答被提问者采纳