Question

I was writing some java last night and I had two constructors that looked basically alike, except my default constructor provided some values to my object, it was something like this:

testObject(){
     width=5;
     height=12;
     depth=7;
     //other stuff is the same as the next one
}

testObject(int x, int y, int z){
    width=x; 
    height = y;
    depth = z;
    //All the other stuff is the same as default
}

So in this case, I was able to convert the code to do this instead:

testObject(){
    this(5,12,7);
}

That sent the values from the default constructor back to the constructor as the 3-int constructor to be built as such. Is there any way to get this type of functionality in C++?

Answer 1

In C++0x, you can do this:

TestObject() :TestObject{5, 12, 7} {}

See Delegating Constructors for more details. (Curly braces not look familiar to you? They’re for preventing narrowing.)

If you don’t have C++0x available yet, then in your case, you can use default arguments as mentioned in other answers here.