#include <stdio.h>

void plus1(int x,int y){
	x +=1;
	y +=1;
}
void plus2(int *x,int *y){
	*x +=2;
	*y +=2;
}

int main(void) {
	int x=3;
	int y=5;
	
	for(int i=0;i<5;i++){
		if(i%3){
			plus1(x,y);
		}else{
			plus2(&x,&y);
		}
	}
	printf("x=%d\ny=%d\n",x,y);
	return 0;
}