Question

I have created a file called untitled1.cpp in dev-cpp with the following script:

#include <iostream.h>
using namespace std;
int main(){
    cout << "C++";
    return 0;
}

But the compiler shows errors like:

1 F:\Dev-Cpp\include\c++\3.4.2\backward\iostream.h:31,
from F:\Dev-Cpp\Untitled1.cpp In file included from
include/c++/3.4.2/backward/iostream.h:31, from
F:\Dev-Cpp\Untitled1.cpp 32:2
F:\Dev-Cpp\include\c++\3.4.2\backward\backward_warning.h #warning This
file includes at least one deprecated or antiquated header. Please
consider using one of the 32 headers found in section 17.4.1.2 of the
C++ standard. Examples include substituting the header for the
header for C++ includes, or instead of the deprecated
header . To disable this warning use -Wno-deprecated.

What is the error that I have? How do I fix it?

Answer 1

In C++ you import the standard library without using the .h suffix.

#include <iostream>

So your fixed example:

#include <iostream>

int main(int argc, char **argv) {
    std::cout << "C++";
    return 0;
}