除以两个给定的整数，显示结果为3位小数

#include <stdio.h>

int main (void)
{

    int i1, i2;

    printf ("Enter two numbers: ");
    scanf ("%i%i", &i1, &i2);

    if (i2 == 0)
        printf ("the second number cannot be zero.");
    else
        printf ("%i / %i = %.3f /n", i1, i2, (float) i1 / i2);

    return 0;
}