遇到这个问题如何作答？

//C = 5/9*(F-32)
#include <stdio.h>

int main()
{
    float C;
    float F[10] = {10.5,1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0};
    int i = 0;
    for(i=0;i<10;i++)
    {
        C = (float)5/9*(F[i]-32);
        printf("%0.1f    ",C);
        if(i%2!=0)
        {
            printf("\n");
        }
    }

    return 0;
}
~