[英]Error: no match for 'operator>>' (operand types are 'std::istream {aka std::basic_istream<char>}' and 'std::vector<double>')
[英]Error: no match for ‘operator*’ (operand types are ‘std::vector<std::complex<double> >’ and ‘std::complex<double>’)
我使用帶有復數的向量類,我必須將復數向量與復數相乘,如下所示:
vector< complex<double> > vec;
complex<double> z;
// some initialization of vec and z ...
vector< complex<double> > res;
res = vec*z; // here is the error
error: no match for 'operator*' (operand types are 'std::vector<std::complex<double> >' and 'std::complex<double>')
是否可以使用這些參數重載operator *?
是的,這是可能的。 以下是如何為complex<T>
實現自己的運算符*
:
template <typename T>
vector<complex<T>> operator *(const vector<complex<T>>& v, const complex<T> z) {
vector<complex<T>> res;
transform(v.begin(), v.end(), back_inserter(res),
[&](complex<T> x) -> complex<T> {
return x * z;
});
return res;
}
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