c - Buffer Overflow Problem -

i trying run buffer overflow example run code, problem when try run code buffer overflow, windows throws prompt stating "program has stopped working, windows checking solution program. when try make sure has overflow 1 byte. program runs, doesn't pause command window in order me see segmentation fault error address. understanding need in order change , make run desired window passed parameter.here simple program.

#define buf_len 5  int main(int argc, char **argv) {  char buf[buf_len];  if (argc > 1) {  strcpy(buf, argv[1]); }  return 0;  printf(buf);  system("pause"); } 

the problem lies fact buffer overflow behavior not standardized - example may refer older version of windows, still printed error address, or different operating system.

additionally, not buffer overflows cause program crash - depends on data written where. small buffer overflows, may overwriting other local variables or padding space, instead of essential program execution (like function return address).