#include <stdio.h>
 
void add_vectors( double vector1[], double vector2[],double vector3[], int n){
	int i;
 
	for(i=0; i < n; i++)
	    vector3[i] = vector1[i] + vector2[i];
}
void print_vector(double vector[], int n){
	putchar('{');
	for(int i = 0; i < n; ++i){
		if(i)
			printf(", ");
		printf("%f", vector[i]);
	}
	puts("}");
}
 
int main(void) {
	double vector1[] = { 1,2,3 };
	double vector2[] = { 1,3,5 };
	double vector3[sizeof(vector1)/sizeof(*vector1)];
	int n = sizeof(vector1)/sizeof(*vector1);
	add_vectors(vector1, vector2, vector3, n);
	print_vector(vector3, n);
	return 0;
}
 

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