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我们可以确定这valarray是一个专门的类模板吗?这就是为什么它不会让隐式转换发生?
valarray
std::valarray<int> values={1.0,2.0}; for(int it: values ){ std::cout<<it<<std::endl; }
错误:将 '1.1000000000000001e+0' 从 'double' 缩小到 'int' [-Wnarrowing]