#include <stdio.h>

typedef struct MyStruct MyStruct;

void foo(MyStruct* s);

struct MyStruct {
	int a;
	int b;
};

void foo(MyStruct *p) {
	printf("%d %d\n", p->a, p->b);
}

int main(void) {
	MyStruct ms = {a:100, b:120};
	foo(&ms);
	return 0;
}