Thread: Adding a constant to multiple variables

Hi,

I was hoping someone could help me with this problem.

Instead of using:

Code:

x=x+k
y=y+k
z=z+k

Is there a more elegant method of adding the same constant to many variables?

Something like:

Code:

(x, y, z) = (x, y, z) + k  ??

I tried searching for a solution but couldn't find what I was looking for.

Thanks for any help

This C code

Code:

x=x+k;
y=y+k;
z=z+k;

Can instead be

Code:

x+=k;
y+=k;
z+=k;

Tim S.

Originally Posted by melia789

Thanks Tim, would that be considered the most elegant?

Depending on the problem, writing a function could be the most elegant solution.

If you have to do it three or more times; I say write a function.
Once only, not really worth a function.
Twice, it is had to decide what is better.

Tim S.

You could define x,y,z in a structure and make a function which adds the values

Code:

#include <stdio.h>
#include <stdlib.h>

struct point_t
{
  int x;
  int y;
  int z;
};

/* Add 'k' to x, y, z */
void add_k(struct point_t *p, int k);

int main(int argc, char *argv[])
{
    struct point_t point;

    int k = 4;

    point.x = 1;
    point.y = 1;
    point.z = 1;

    printf("First Values:\tx=%d\ty=%d\tz=%d\n", point.x, point.y, point.z);

    add_k(&point, k);

    printf("Results:\tx=%d\ty=%d\tz=%d\n", point.x, point.y, point.z);

    return EXIT_SUCCESS;
}

void add_k(struct point_t *p, int k)
{
    p->x += k;
    p->y += k;
    p->z += k;
}