Another buf example

exploitable2.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
int main(int argc, const char* argv[])
{
  if(argv != 2)
  {
    printf("Usage: %s <text>\n",argv[0]);
    exit(1);
  }
 
  char buf[50];
  strcpy(buf,argv[1]);
  printf("You wrote:\n%s\n",buf);
  return 0;
}

good，