v[0] = 5;
v[1] = 4;
v[2] = 9;
v[3] = 3;
v[4] = 2;

for(i=0; i<5; i++) {
printf("もとの値[%d] = %d\n", i, v[i]);
calcMinusDiv(v[i], &minus, &div);
}
printf("負の総和は %d 割り算の値は %.3f\n", minus, div);

return 0;
}

void calcMinusDiv(int v, int *minusp, double *divp)
{
*minusp -= v;
*divp /= v;
}