gistfile1.txt

shiro@intermezzo:~/src/Gauche/src$ cat t.c
#include <stdio.h>
#include <math.h>

int main()
{
    double x = 1.0 - pow(2.0, -52);
    double y = cbrt(x);
    printf("%20.17lf %20.17lf\n", x, y);
    return 0;
}
shiro@intermezzo:~/src/Gauche/src$ cc t.c -lm
shiro@intermezzo:~/src/Gauche/src$ ./a.out
 0.99999999999999978  1.00000000000000022