RationalNumberCollection* rncRemove(RationalNumberCollection *c, RationalNumber n) {
printf("\n %i/%i will be removed from the storage.\n",n.numerator,n.denominator);
int pos = rncFindPosition(c,n);
if(pos != -1 && c->collection[pos].count > 1) {
c->collection[pos].count--;
RationalNumber subtrahend = c->collection[pos].rn;
c->rnSum = rnSubtract(c->rnSum,n);
c->totalCount--;
} else{
if((c->nfi <= c->size/2)) {
RationalNumberCollection *cNew = rncUpdateSize(c, false);
c = rncDelete(c);
c = cNew;
}
if(pos != -1 && c->collection[pos].count == 1) {
for(int i = pos; i < c->nfi-1; i++) {
c->collection[i] = c->collection[i+1];
}
RationalNumber subtrahend = c->collection[c->nfi-1].rn;
c->rnSum = rnSubtract(c->rnSum,n);
c->nfi--;
c->collection[c->nfi].count = 0;
c->collection[c->nfi].rn.numerator = 0;
c->collection[c->nfi].rn.denominator = 1;
c->totalCount--;
c->totalUniqueCount--;
}else{
printf("\n %i/%i could not be removed from the storage.\n",n.numerator,n.denominator);
}
}
print(c);
return c;
}
} END_TEST
/********************** Test Subtract Function, complex results *********************/
START_TEST(subtraction_complex_result) {
RomanNumber rn1 = newRomanNumber("CL");
RomanNumber rn2 = newRomanNumber("LX");
RomanNumber difference = rnSubtract(rn1, rn2);
ck_assert_str_eq("XC", to_string(difference));
ck_assert_int_eq(90, to_a(difference));
} END_TEST
} END_TEST
/******************** Test Subtract Function, start simple 10-1=9 *******************/
START_TEST(subtraction_10_minus_1_equals_9_subtractive_result) {
RomanNumber rn1 = newRomanNumber("X");
RomanNumber rn2 = newRomanNumber("I");
RomanNumber difference = rnSubtract(rn1, rn2);
ck_assert_str_eq("IX", to_string(difference));
ck_assert_int_eq(9, to_a(difference));
} END_TEST
} END_TEST
/******************** Test Subtract Function, start simple 10-5=5 *******************/
START_TEST(subtraction_10_minus_5_equals_5) {
RomanNumber rn1 = newRomanNumber("X");
RomanNumber rn2 = newRomanNumber("V");
RomanNumber difference = rnSubtract(rn1, rn2);
ck_assert_str_eq("V", to_string(difference));
ck_assert_int_eq(5, to_a(difference));
} END_TEST
void rncRemove(RationalNumberCollection *c, RationalNumber rn) {
// Wenn rn ungültig -> return
if (!rnIsValid(rn)) {
return;
}
// Länge der Collection ermitteln
int len = rncTotalUniqueCount(*(&c));
// Wenn Collection leer -> return
if (len == 0) {
return;
}
// rn kürzen
rn = rnShorten(rn);
// Zeiger auf Collection
RationalNumber (*ptr)[2] = c->rn;
// Falls Bruch bereits vorhanden
int i = rncSearch(*(&c), rn, 0, len-1);
if (i >= 0) {
// Veringere Counter des Bruchs
ptr[i][1].numerator--;
// Veringere totalCount der Collection
c->totalCount--;
// Verringere sum der Collection
c->sum = rnShorten(rnSubtract(c->sum,rn));
// Wenn Counter anschließend == 0, entferne Bruch aus Collection
if (ptr[i][1].numerator == 0) {
ptr[i][0].numerator = 0;
ptr[i][0].denominator = 0;
// Verringere totalUniqueCount der Collection
c->totalUniqueCount--;
// Collection sortieren wenn Bruch nicht letzter Bruch in der Collection war
if (len > 1) {
rncSort(*(&c), len);
}
// Berechne median der Collection
rncCalcMedian(*(&c));
}
// Berechne average der Collection
rncCalcAverage(*(&c));
}
}
/*
calculates the new values for the members of the given collection, after
a rational number was removed
*/
void rncRemoved(RationalNumberCollection* c, RationalNumber r, bool isZero){
if(isZero){
c->totalUniqueCount--;
}
c->totalCount--;
if(rncTotalCount(c) < 1) {
RationalNumber rnZero = { 0,1 };
c->sum = rnZero;
c->average = rnZero;
} else {
c->sum = rnSubtract(c->sum, r);
RationalNumber rnDivisor = { c->totalCount, 1 };
c->average = rnDivide(c->sum, rnDivisor);
}
rncCalcMedian(c);
return;
}
} END_TEST
/*******************************************************************************
* Use above API to subtract two roman numbers *
******************************************************************************/
/******************** Test Subtract Function, start simple 2-1=1 *******************/
START_TEST(create_function_to_subtract_two_numbers) {
RomanNumber rn1 = newRomanNumber("II");
RomanNumber rn2 = newRomanNumber("I");
RomanNumber difference = rnSubtract(rn1, rn2);
ck_assert_str_eq("I", to_string(difference));
ck_assert_int_eq(1, to_a(difference));
} END_TEST
/*
reduce the count of the given rational number by one and removes
the rational number if the count reaches zero
*/
void rncRemove(RationalNumberCollection* c, RationalNumber r){
if(!rnIsValid(r) || c->totalUniqueCount==0){
return;
}else{
int index = rncExists(c, r);
if(index == -1){
return;
}else{
RationalNumber rnOne = { 1,1 };
c->rnList[index+1] = rnSubtract(c->rnList[index+1], rnOne);
if(c->rnList[index+1].numerator == 0){
rncCleanUp(c,index);
rncRemoved(c, r, true);
}else{
rncRemoved(c, r, false);
}
}
return;
}
}