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Code: Alles auswählen

#include <stdio.h>
#include <stdlib.h>
 
int main(void) {
  unsigned int i;	
  int n, result;
  char *buffer;
 
  printf("Wieviele Sterne? ");
  scanf("%u", &i);
 
  buffer = (char*) malloc(i + 1);  // ein Byte extra für das String-Ende-Zeichen
  if (buffer != NULL) {            // sonst haben wir keinen Speicher bekommen
    buffer[i] = '\0';              // String-Ende-Zeichen setzen

    while(i--) {
      buffer[i] = '*';             // String mit Sternchen füllen
    }

    printf("%s\n", buffer);
    free(buffer);                  // Wichtig! Speicher wieder freigeben

    result = EXIT_SUCCESS;
  }
  else {
    printf("Not enough memory to create %u stars\n", i);
    result = EXIT_FAILURE;
  }
  
  return result;
}

Code: Alles auswählen

#include <stdio.h>

int main(void) {
    unsigned char *p;
    unsigned char ch @ 0xF402;
	
    p = (unsigned char *) 0xF400;
    *p = 23;
    ch = 16;
	
    printf("%d\n", *p);
    printf("%d\n", ch);
    printf("%d\n", *((unsigned char *) 0xF402));

    return 0;
}

Code: Alles auswählen

#include <stdio.h>

    unsigned char ch @ 0xF402;

int main(void) {
    unsigned char *p;
	
    p = (unsigned char *) 0xF400;
    *p = 23;
    ch = 16;
	
    printf("%d\n", *p);
    printf("%d\n", ch);
    printf("%d\n", *((unsigned char *) 0xF402));

    return 0;
}