1，代码中有错误 for x=j+1 to 31 》》》》for x=k+1 to 31---------------------------------
1，代码中有错误 for x=j+1 to 31 》》》》for x=k+1 to 31---------------------------------
3条回答
2022-11-11 21:27
1，代码中有错误 for x=j+1 to 31 》》》》for x=k+1 to 31 ------------------------------------------- 你的意思就是算位置，既然是组合，肯定就用组合公式推导了。 反推:(为少打点字，以6选3为例) k为6 公式C(m,n)为m选n组合
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for x=j+1 to 31 》》》》for x=k+1 to 31
-------------------------------------------
你的意思就是算位置，既然是组合，肯定就用组合公式推导了。
反推:(为少打点字，以6选3为例)
k为6
公式C(m,n)为m选n组合
f(x,y,z)=C(6,3)-[ C((k-x),3) + C((k-y),2) + C((k-z),1) ]
正推就自己推吧！
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