lingo中输入代码后出现invalid input：a syntax error，急！

你这是lindo的语法 没有错误 可能需要选择用lindo语法运行

Global optimal solution found.
Objective value: 24640.00
Infeasibilities: 0.000000
Total solver iterations: 5

Variable Value Reduced Cost
X11 1526.667 0.000000
X12 473.3333 0.000000
X13 0.000000 5.400000
X21 1017.778 0.000000
X22 1482.222 0.000000
X23 0.000000 1.400000
X31 0.000000 0.000000
X32 1200.000 0.000000
X33 0.000000 1.400000