Can I make a constructor in C++ of different data types?

Question

I have a class which has multiple data members of different data types. I was wondering if I can create and initialize an object using a constructor.

class test
{
     public:
            int a;
            string b;
            float c;

      test (int x, string y, float z);

};


int main()
{

    test t1(10,"Hello",2.5f); //this line doesn't work

}

Answer 1

The fact that it doesn't work is not really what we do on StackOverflow. You should provide an error message.

With that said, I suppose you are getting an error from the linker because your constructor does not include a definition, but only a declaration.

Here's a working example: https://godbolt.org/z/r89cf86s3

#include <string>

class test
{
public:
    int a;
    std::string b;
    float c;

    test (int x, std::string y, float z) : a{x}, b{y}, c{z}
    {}
};


int main()
{
    test t1(10, "Hello", 2.5f);
}

NOTE Passing std::string by value to the constructor can lead to temporary objects being created, so to keep the workings of this code and improve it, you could use a const-reference, i.e. const std::string& as parameter of the constructor.