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#include <stdio.h>
int main()
{
float d1,d2,d3,a=1.3;
double b = 1.3;
d1 = 19.5/1.3;
d2 = 19.5/a;
d3 = 19.5/b;
printf ("%f,%f,%f\n",d1,d2,d3);
printf ("%.14lf,%.14lf\n",
(double)a,b);
printf ("%.14lf,%.14lf,%.14lf\n",
(double)d1,(double)d2,(double)d3);
}
15.000000,15.000001,15.000000
1.29999995231628,1.30000000000000
15.00000000000000,15.00000095367432,15.00000000000000