#include <stdlib.h>
#include <stdio.h>

void mydiv(int dividend, int divisor, int* quotient, int* remainder)
{
  *quotient = dividend / divisor;
  *remainder = dividend - *quotient * divisor;
}

int testData[][2] =
{
  { +5, +3 },
  { +5, -3 },
  { -5, +3 },
  { -5, -3 },
};

int main(void)
{
  unsigned i;
  for (i = 0; i < sizeof(testData)/sizeof(testData[0]); i++)
  {
    div_t res1, res2;
    res1 = div(testData[i][0], testData[i][1]);
    mydiv(testData[i][0], testData[i][1], &res2.quot, &res2.rem);
    printf("%+d/%+d = %+d:%+d %c= %+d:%+d\n",
           testData[i][0], testData[i][1],
           res1.quot, res1.rem,
           "!="[res1.quot == res2.quot && res1.rem == res2.rem],
           res2.quot, res2.rem);
  }
  return 0;
}