Linked Questions
56 questions linked to/from Using std Namespace
3460
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39
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1.3m
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What's the problem with "using namespace std;"?
I have heard using namespace std; is wrong, and that I should use std::cout and std::cin directly instead.
Why is this? Does it risk declaring variables that share the same name as something in the ...
- 35.4k
72
votes
5
answers
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std::string vs string in c++ [duplicate]
Possible Duplicates:
Why is 'using namespace std;' considered a bad practice in C++?
Using std Namespace
I've been hovering around a bunch of different forums and I seem to see this pop up every time ...
- 12.4k
64
votes
2
answers
314k
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What is the use of "using namespace std"? [duplicate]
What is the use of using namespace std?
I'd like to see explanation in Layman terms.
- 647
4
votes
4
answers
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views
C++ "using std::<type>" vs calling std::<type> every time [duplicate]
Possible Duplicate:
Using std Namespace
Why is 'using namespace std;' considered a bad practice in C++?
Let's say I'm using #include <iostream> in C++ and I'm making a print ...
- 15.6k
3
votes
3
answers
600
views
C++ namespaces - "using" or explicitly stated? [duplicate]
Possible Duplicates:
Why is ‘using namespace std;’ considered a bad practice in C++?
Using std Namespace
Is it just a matter of preference? Or is there a valid reason for preferring
...
- 40.5k
1
vote
2
answers
828
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Is it ok to write "using std::vector;" in the header? instead of writing std::vector<int>v every time? [duplicate]
Since, i got to know that writing "using namespace std;" in the header should be avoided. And now i find it pretty annoying to write "std::" before vector,string,cout,cin etc every ...
- 61
0
votes
1
answer
590
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QT Creator does not recognize STL types for new projects [duplicate]
I have an existing project where the STL types are recognized. However, when creating a new project none of the STL types are not recognized. For example in
#include <string>
string s;
the ...
- 249
1
vote
1
answer
184
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What is the difference of using std:: vs. not using it in C++? [duplicate]
Possible Duplicate:
Using std Namespace
I was just wondering if there was some reason to include std:: in some operations, like std::sort() for example. Is it because of possible overloading?
user1162715
2439
votes
15
answers
294k
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Should 'using' directives be inside or outside the namespace in C#?
I have been running StyleCop over some C# code, and it keeps reporting that my using directives should be inside the namespace.
Is there a technical reason for putting the using directives inside ...
- 38.5k
257
votes
16
answers
233k
views
How do you properly use namespaces in C++?
I come from a Java background, where packages are used, not namespaces. I'm used to putting classes that work together to form a complete object into packages, and then reusing them later from that ...
- 59.2k
191
votes
8
answers
270k
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147
votes
9
answers
127k
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"using namespace" in c++ headers [duplicate]
In all our c++ courses, all the teachers always put using namespace std; right after the #includes in their .h files. This seems to me to be dangerous since then by including that header in another ...
- 22k
71
votes
5
answers
4k
views
Why is my log in the std namespace?
In the code below, I define a trivial log function. In main I try not to call it; I call std::log. Nevertheless, my own log is called; and I see "log!" on screen. Does anyone know why? I use G++ 4.7 ...
- 11.3k
18
votes
2
answers
7k
views
C++ Standard Library: How to write wrappers for cout, cerr, cin and endl?
I do not like using namespace std, but I am also tired of having to type std:: in front of every cout, cin, cerr and endl. So, I thought of giving them shorter new names like this:
// STLWrapper.h
#...
- 79k
30
votes
5
answers
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Global variable "count" ambiguous
#include <algorithm>
using namespace std;
int count = 0, cache[50];
int f(int n)
{
if(n == 2) count++;
if(n == 0 || n==1) return n;
else if (cache[n] !=- 1) return cache[n];
...
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