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Add solution for string sorting.

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paulusja 2025-11-13 13:28:38 +01:00
parent 3ab40ce245
commit 5a3b146df3
1 changed files with 46 additions and 3 deletions
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49
06_erweiterte_zeiger/stringsortierung.c
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@ -12,27 +12,70 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
void gibStringsAus(const char *strings[], unsigned int anzahl);
#define STRING_GROESSE 10
//void gibStringsAus(const char *strings[], unsigned int anzahl);
void gibStringsAus(const char strings[][STRING_GROESSE], unsigned int anzahl);
int compare(const void *arg1, const void *arg2);
int main() int main()
{ {
const char *strings[] = {"789", "Zorro", "Adam", "Werner", "123", "Bernd", "Hubert", "456"}; //const char *strings[] = {"789", "Zorro", "Adam", "Werner", "123", "Bernd", "Hubert", "456"};
char strings[][STRING_GROESSE] = {"789", "Zorro", "Adam", "Werner", "123", "Bernd", "Hubert", "456"};
unsigned int anzahlStrings = sizeof(strings)/sizeof(strings[0]); unsigned int anzahlStrings = sizeof(strings)/sizeof(strings[0]);
printf("Vor Sortierung:\n"); printf("Vor Sortierung:\n");
gibStringsAus(strings, anzahlStrings); gibStringsAus(strings, anzahlStrings);
qsort(strings, anzahlStrings, sizeof(strings[0]), compare);
printf("\nNach Sortierung:\n"); printf("\nNach Sortierung:\n");
gibStringsAus(strings, anzahlStrings); gibStringsAus(strings, anzahlStrings);
return EXIT_SUCCESS; return EXIT_SUCCESS;
} }
void gibStringsAus(const char *strings[], unsigned int anzahl) /*void gibStringsAus(const char *strings[], unsigned int anzahl)
{
for(int i = 0; i < anzahl; i++)
{
printf("%s\n", strings[i]);
}
}*/
void gibStringsAus(const char strings[][STRING_GROESSE], unsigned int anzahl)
{ {
for(int i = 0; i < anzahl; i++) for(int i = 0; i < anzahl; i++)
{ {
printf("%s\n", strings[i]); printf("%s\n", strings[i]);
} }
} }
int compare(const void *arg1, const void *arg2)
{
//const char *string1 = *(const char **)arg1;
//const char *string2 = *(const char **)arg2;
const char (*zgr1)[STRING_GROESSE] = (char (*)[STRING_GROESSE])arg1;
const char (*zgr2)[STRING_GROESSE] = (char (*)[STRING_GROESSE])arg2;
const char *string1 = *zgr1;
const char *string2 = *zgr2;
if(!isdigit(string1[0]) && !isdigit(string2[0]))
{
return strcmp(string1, string2);
}
else if(isdigit(string1[0]) && isdigit(string2[0]))
{
return -strcmp(string1, string2);
}
else
{
if(isdigit(string1[0]))
return 1;
else
return -1;
}
}