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解方程组问题。
写成 sol 是告诉你内定返回值顺序是 R1,R2,r2，这是一个结构体，要得到 R1,R2,r2可以用: sol.R1 sol.R2 sol.r2 用sol做返回值的好处是不用关心返回值顺序。 由于现在已经知道正确的顺序是 R1,R...
3 years ago | 0
| accepted
