Function main

code/Chapter2/2-1.c:17–28

                x=(a/4)+i;
}
int main()
{
        unsigned long b[m],start ,end,k;
        for(j=0;j<10;j++){
                start = rpcc();
                fun(16);
                end = rpcc();
                b[j]=end -start;
                k+=b[j];
        }
        printf("time = %ld\n",k/m);
}