DEVC/DEVC++ IDE 不支持向量吗

Question

#include <bits/stdc++.h>
using namespace std;

int main()
{
    vector<int> vect1(10);
    int value = 5;
    fill(vect1.begin(), vect1.end(), value);
    for (int x : vect1)
        cout << x << " ";
}

this does not compile in dev c++ and shows error.. i directly copied this code from gfg--> link is https://www.geeksforgeeks.org/initialize-a-vector-in-cpp-different-ways/ .

EDIT: it says range based for loops are not allowed in cpp98 version

im new to cpp any help is appreciated!

Answer 1

This <bits.stc++.h> is not a standard header file of GNU C++ library. So some compiler may fail to compiler source code with this header file. Include the <vector> and <iostream> headers in the project:

#include <iostream>
#include <vector>

using namespace std;

int main()
{
    vector<int> vect1(10);
    int value = 5;
    fill(vect1.begin(), vect1.end(), value);
    
    for (int x : vect1)
        cout << x << " ";
}

---

References

• How does #include <bits/stdc++.h> work in C++?

Answer 2

Probably, Dev C++ has C++98 as default, and range-based for loop is from C++11 and onwards.

You click on Tools:

Click on Compile Options:

Click on Settings:

Click on Code Generation: On language standards, choose "ISO C++11"

But you shouldn't use Dev C++ anymore.

Answer 3

The problem is not the compiler. The #include <bits/stdc++.h> is a standard header which most of the sites use in their example codes and it includes a lot of other c++ header files but this is not defined in any C++ standard and not recommended at all because all compilers doesn't support it and it effects the portability of the code.

Here is the detailed explanation of this: Why should I not #include <bits/stdc++.h>?