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

int main(int argc, char *argv[])
{
    int i;
    double x1, x2, eps;

    if (argc < 4) {
        fprintf(stderr, "usage: %s x1 x2 eps\n", argv[0]);
        return 1;
    }
    x1 =atof(argv[1]);
    x2 =atof(argv[2]);
    eps=atof(argv[3]);
    printf("[% g, % g] % e\n", x1, x2, eps);
    return 0;
}