Fatal error: ‘stdafx.h’ file not found
stdafx.h is the precompiled header used by Visual Studio, you do not need this. You seem to have missed out the int main() function It is std::endl not std::end1 So something like this:
c++
“non-standard syntax; use ‘&’ to create a pointer to member” error in Visual Studio 2015
If you use instead of your compiler will think you want to use a function pointer instead of the method itself, and if you would have wanted to use a function pointer, you would still have to get the address of it (using &). So make sure you don’t forget your () after a function … Read more
C++ int float casting
Integer division occurs, then the result, which is an integer, is assigned as a float. If the result is less than 1 then it ends up as 0. You’ll want to cast the expressions to floats first before dividing, e.g.
How to fix ‘std::logic_error’ what(): basic_string::_M_construct null not valid error?
The problem is the two return 0; statements in your function. The function returns a std::string, which has no constructors that accept an int as input. But, it does have a constructor that accepts a const char * pointer, which 0 is implicitly convertible to. However, constructing a std::string with a null char * pointer is undefined behavior, and your implementation has chosen to throw a std::logic_error exception that … Read more
Right way to split an std::string into a vector
For space separated strings, then you can do this: Output: string that have both comma and space Output:
How to convert vector to array
There’s a fairly simple trick to do so, since the spec now guarantees vectors store their elements contiguously:
What are helper functions in C++?
“helper function” is not a term that you would find in a standard, neither it has an exact definition… standard mentions “helper class” or “helper template” few times to refer to a class, which is not meant to be instantiated by end-users but it provides an useful functionality internally used within another class. Helper functions are (what I believe the … Read more
how to convert C# to C++
Actually as it is complicated to mix C# and C++ on unix, I am trying to convert C# to C++ Have you considered Mono? It is something that’s definitely worth checking before starting to learn C++ in order convert and run an existing .NET application on Unix. It’s also binary compatible meaning that you don’t even … Read more
Difference of keywords ‘typename’ and ‘class’ in templates?
typename and class are interchangeable in the basic case of specifying a template: and are equivalent. Having said that, there are specific cases where there is a difference between typename and class. The first one is in the case of dependent types. typename is used to declare when you are referencing a nested type that depends on another template parameter, such as the typedef in … Read more
C++: std does not have member “string”
You need to add the following: