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Verbesserung von len<2 da sonst strukturelle Fehler

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This commit is contained in:
Nicole Hanstein 2025-12-04 08:07:38 +01:00
parent 28e76fdbb7
commit c66935ad26
1 changed files with 17 additions and 13 deletions
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30
numbers.c
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@ -31,9 +31,7 @@ void createchecknumber(unsigned int len, unsigned int numbers[])
do do
{ {
unsigned int value = 0; unsigned int value = (rand() % (len * 2) + 1);
value = (rand() % (len * 2) + 1);
same = 0; same = 0;
for (unsigned int j = 0; j < i; j++) for (unsigned int j = 0; j < i; j++)
@ -56,6 +54,11 @@ void createchecknumber(unsigned int len, unsigned int numbers[])
unsigned int *createNumbers(unsigned int len) unsigned int *createNumbers(unsigned int len)
{ {
if (len < 2) //sonst Index-Auswahl-Dauerschleife
{
return NULL;
}
if (RANDOM_SEED == 0) if (RANDOM_SEED == 0)
{ {
srand(time(NULL)); srand(time(NULL));
@ -68,7 +71,7 @@ unsigned int *createNumbers(unsigned int len)
unsigned int *numbers = malloc(sizeof(unsigned int) * len); unsigned int *numbers = malloc(sizeof(unsigned int) * len);
if (numbers == NULL) if (numbers == NULL)
{ {
return 0; return NULL; //
} }
createchecknumber(len, numbers); createchecknumber(len, numbers);
@ -78,9 +81,6 @@ unsigned int *createNumbers(unsigned int len)
do do
{ {
i = 0;
j = 0;
i = rand() % len; i = rand() % len;
j = rand() % len; j = rand() % len;
@ -89,7 +89,6 @@ unsigned int *createNumbers(unsigned int len)
numbers[i] = numbers[j]; numbers[i] = numbers[j];
return numbers; return numbers;
} }
void sortnumbers(unsigned int numbers[], unsigned int len) void sortnumbers(unsigned int numbers[], unsigned int len)
@ -109,15 +108,20 @@ void sortnumbers(unsigned int numbers[], unsigned int len)
} }
} }
// Returns only the only number in numbers which is present twice. Returns zero on errors.
unsigned int getDuplicate(const unsigned int numbers[], unsigned int len) unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
{ {
if (numbers == NULL || len < 2) // sonst Index-Auswahl-Dauerschleife
{
return 0;
}
unsigned int *copynumbers = malloc(sizeof(unsigned int) * len); unsigned int *copynumbers = malloc(sizeof(unsigned int) * len);
if (copynumbers == NULL) if (copynumbers == NULL)
{ {
return 0; return 0;
} }
for (unsigned int i = 0; i < len; i++) for (unsigned int i = 0; i < len; i++)
{ {
copynumbers[i] = numbers[i]; copynumbers[i] = numbers[i];
@ -127,15 +131,15 @@ unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
for (unsigned i = 0; i < len - 1; i++) for (unsigned i = 0; i < len - 1; i++)
{ {
if (copynumbers[i] == copynumbers[i+1]) if (copynumbers[i] == copynumbers[i + 1])
{ {
unsigned int a = copynumbers[i]; unsigned int a = copynumbers[i];
free (copynumbers); free(copynumbers);
return a; return a;
} }
} }
free (copynumbers); free(copynumbers);
return 0; return 0;
} }