consider the program below

    char str[5];
    strcpy(str,"Hello12345678");
    printf("%s",str);

When run this program gives segmentation fault.

But when strcpy is replaced with following, program runs fine.

strcpy(str,"Hello1234567");

So question is it should crash when trying to copy to str any other string of more than 5 chars length.

So why it is not crashing for "Hello1234567" and only crashing for "Hello12345678" ie of string with length 13 or more than 13.

This program was run on 32 bit machine .