using namespace std in c means

c语言using namespace std_罅隙`的博客-csdn博客

using namespace std_prolayman的博客-csdn博客

cusingnamespacestd可以不使用头文件使用吗这些c基础知识的基础知识

vs2019更新之后加入usingnamespacestd报错includevector也报错

include iostream> using namespace std; int main() { int a[10],b

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