Programming

$ cat mod.c
#include <stdio.h>

int main(void)
{
        int x;
        int t=10;
        for(x=0; x<t*2; x++)
        {
                double y=(x%t)/(double)t;
                printf("%d\t%f\n", x, y);
        }
}

$ gcc mod.c
$ ./a.out
0       0.000000
1       0.100000
2       0.200000
3       0.300000
4       0.400000
5       0.500000
6       0.600000
7       0.700000
8       0.800000
9       0.900000
10      0.000000
11      0.100000
12      0.200000
13      0.300000
14      0.400000
15      0.500000
16      0.600000
17      0.700000
18      0.800000
19      0.900000
$