数据溢出问题 - Githubissues

loceyi / vlbiOrbitSimulation

MIT License

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Open loceyi opened 5 years ago

loceyi commented 5 years ago

302460601000;这是按照int数相乘，结果超出了int表示的范围，发生了上溢出，所以结果变成了负数，然后再将结果存放到long型变量中改正的方式：

long b=302460601000L;

loceyi commented 5 years ago

numpy currently does not do any integer over/underflow (or wraparound) checks at all for array operations. Only the scalar operators warn. 2.在用dot时，如果输入的是一个很大的int型数据，十分容易溢出