$ cat a.cpp
#include <stdio.h>

struct Point {
   Point(int a_x, int a_y) : x(a_x), y(a_y) {}
   int x;
   int y;
};

int main() {
   Point point(5,6);
   printf("%d,%d\n", point.x, point.y);
   return 0;
}

$ g++ -o a a.cpp && a
5,6

##</code><code>##

int i = 5;

##</code><code>##

int i(5);

##</code><code>##

Point(int a_x, int a_y) : x(a_x), y(a_y) {}

##</code><code>##

Point(int a_x, int a_y) { x = a_x; y = a_y; }