file.d:
extern(C)
{
int x = 0;
void setx();
void printx();
}
void main()
{
setx(); // sets x = 42
writeln(x); // prints x = 0
printx(); // prints x = 42
x = 7;
printx(); // prints x = 42
}
file.c:
#include <stdio.h>
extern int x;
void setx()
{
x = 42;
}
void printx()
{
printf("%d\n", x);
}
Output:
0
42
42
