distance-between-2-points.c

#include <stdio.h>
#include <math.h>

struct point
{
    double x, y, z;
};

int main()
{
    //double x1, y1, z1;
    //double x2, y2, z2;
    struct point p1, p2;

    double dist;

    printf("Enter the values of x, y and z for Point 1:\n");
    //scanf("%lf%lf%lf", &x1, &y1, &z1);
    scanf("%lf%lf%lf", &p1.x, &p1.y, &p1.z);
    printf("Enter the values of x, y and z for Point 2:\n");
    //scanf("%lf%lf%lf", &x2, &y2, &z2);
    scanf("%lf%lf%lf", &p2.x, &p2.y, &p2.z);

    //dist=sqrt(pow((x2-x1), 2) + pow((y2-y1), 2) + pow((z2-z1), 2));
    dist=sqrt(pow((p2.x-p1.x), 2) + pow((p2.y-p1.y), 2) + pow((p2.z-p1.z), 2));

    //printf("\n\nThe distance between (%g,%g,%g) and (%g,%g,%g), is %g", x1, y1, z1, x2, y2, z2, dist);
    printf("\n\nThe distance between (%g,%g,%g) and (%g,%g,%g), is %g", p1.x, p1.y, p1.z, p2.x, p2.y, p2.z, dist);

    return 0;
}

the commented sections use the old style without structure...