PTA-平面向量加法（C语言）

#include <stdio.h>
int main(){
	double x1,x2,y1,y2,x,y;
	scanf("%lf %lf %lf %lf",&x1,&y1,&x2,&y2);
	x=x1+x2;y=y1+y2;
	if(x>-0.05&&x<0){
		x=0.0;
	}
	if(y>-0.05&&y<0){
		y=0.0;
	}
	printf("(%1.1f, %1.1f)",x,y);
	return 0;
}