/* error8.c
桁落ち
[1 / n - 1 / (n + 1)] * (n * (n + 1)) = 1 のはずが ...
*/

#include<stdio.h>
main()
{
    int n, i;
    float x, y, z, w;
    n = 10;
    for(i = 0; i < 8; i++){
        x = 1.0 / n;
        y = 1.0 / (n + 1);
        z = x - y;
        w = z *  (n * (n + 1.0));
        printf("n = %9d,   [1/n-1/(n+1)]*(n*(n+1)) = %f\n", n, w);
        n *= 10;
    }
}