// create a structure to store vectors.Then make a function to return 
// sum of two vectors
#include <stdio.h>
struct vector {
    int x;
    int y;
}; //remember to put ; after ending of struct structure
void calcSum(struct vector v1,struct vector v2, struct vector sum);
int main() {
    struct vector v1 = {5, 10};
    struct vector v2 = {3, 7};
    struct vector sum={0};
    
    calcSum(v1, v2, sum);
    return 0;
}

void calcSum(struct vector v1, struct vector v2, struct vector sum){
    sum.x = v1.x + v2.x;
    sum.y = v1.y + v2.y;
    
    printf("sum of x is : %d\n",sum.x);
    printf("sum of y is : %d",sum.y);
}