Exercise 9-3 plane vector addition (15 points)

This question requires the preparation of procedures , Calculate the sum of two two-dimensional plane vectors .

Input format :

Type in a line and press “x1​ y1​ x2​ y2​” The format gives two two two-dimensional plane vectors v1​=(x1​,y1​) and v2​=(x2​,y2​) Components of .

Output format :

In a row, press (x, y) Format output and vector , The coordinates are output to one digit after the decimal point （ Note that... Cannot be output −0.0）.

sample input :

3.5 -2.7 -13.9 8.7

sample output :

(-10.4, 6.0)

The code is as follows ：

#include<stdio.h>
int main()
{
    double x1,y1,x2,y2;
    scanf("%lf %lf %lf %lf",&x1,&y1,&x2,&y2);
    double 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("(%.1f, %.1f)",x,y);
    return 0;
}