将向量初始化为零 C++/C++11
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时间：2020-08-27 16:58:29 来源:igfitidea点击:
initialize a vector to zeros C++/C++11
提问by pyCthon
I know in C++11 they added the feature to initialize a variable to zero as such
我知道在 C++11 中，他们添加了将变量初始化为零的功能
double number = {}; // number = 0
int data{}; // data = 0
Is there a similar way to initialize a std::vectorof a fixed length to all zero's?
是否有类似的方法将std::vector固定长度的 a初始化为全零？
回答by ronag
You don't need initialization lists for that:
您不需要初始化列表：
std::vector<int> vector1(length, 0);
std::vector<double> vector2(length, 0.0);
回答by Dexter's
Initializing a vector having struct, class or Union can be done this way
可以通过这种方式初始化具有结构、类或联合的向量
std::vector<SomeStruct> someStructVect(length);
memset(someStructVect.data(), 0, sizeof(SomeStruct)*length);
