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风

#1 Created at ... [Delete] [Delete and Lock User]

没看懂为啥定义了1.0、3.0、4.0

婤婳

#2 Created at ... [Delete] [Delete and Lock User]

就是需要解的方程x*x + 3*x - 4 = 0的各参数值啊

Svip

#3 Created at ... [Delete] [Delete and Lock User]

因为是double类型后会跟.0的

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