» Mein Programm soll einen zu langen string in ein array einlesen, überschreiben und ausgeben

helloooo

*** stack smashing detected ***: terminated
Aborted (core dumped)

#include <stdio.h>


int main() {
  char buffer[5];
  char c;
  int idx = 0;

  while ((c = getchar()) != EOF) {
    buffer[idx++] = c;
  }
  buffer[idx + 1] = '\0';
  printf("%c\n", buffer);

  return 0;
}

while ((c = getchar()) != EOF) {

helloooo
helloooo
c
*** stack smashing detected ***: terminated
Aborted (core dumped)

int main() {
  char buffer[5];
  char c;
  int idx = 0;

/*
  for (int i = 0; i < 5; i++)
    printf("%c\n", buffer[i]);
*/

  while ((c = getchar()) != EOF) {
    buffer[idx++] = c;
  }
  buffer[idx + 1] = '\0';
  printf("%s\n", buffer);

  return 0;
}

Mach mit!