C :

#include<stdio.h>

int main()
{
	int a,b,c;
	a=12345;
	b=4321;
	c=a-b;
	printf("%d\n",c);
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	int a,b,c;
	a=12345;
	b=4321;
	c=a-b;
	printf("%d\n",c);
	return 0;
}

Pascal :

begin
  writeln(12345-4321);
end.