[Solved] What is “{ x = a; y = b; }” doing in this incialization? [closed]

by 


{ x = a; y = b; }

is the compound statement of the constructor point( int a = 0, int b = 0 );

Maybe it will be more clear if to rewrite the constructor like

point( int a = 0, int b = 0 ) 
{ 
    x = a; 
    y = b; 
}

So the both parameters of the constructor have default argument equal to 0. The data members x and y are initialized (using the assignemnt operator) within the compound statement of the constructor.

The constructor can be called like

point p1; // x and y are initialized by 0
point p2( 10 ); // x is initialized by 10 and y is initialized by the default argument 0
point p3( 10, 20 ); // x is initialized by 10 and y is initialized by 20

The same constructor can be defined also the following way

point( int a = 0, int b = 0 ) : x( a ), y( b ) 
{ 
}

1

solved What is “{ x = a; y = b; }” doing in this incialization? [closed]