strcpy fail
2018年10月10日 — In your program char a2[] = "Hello world";. defines a character array sized to fit the string literal "Hello world" . It can contain 12 characters ... ,2018年7月27日 — as Evan pointed out, it is possible to do something like char* s = strcpy(malloc(10), "test");. e.g. assign malloc()ed memory a value, without using ... ,Because target[1] is a pointer to "bbbbbbbbbb" and you are not allowed to modify string constants. It's undefined behaviour. It's no different to: char *x = "bbb" ... ,2012年6月12日 — Shouldn't the second variation also allocate 2 bytes of memory for s and thus have enough memory to copy "b" there? No, char *s is pointing to ... ,2011年8月22日 — First, copying into an array that is too small: C has no protection for going past array bounds, so if there is nothing sensitive at dst1[5..9] , then ... ,2020年10月5日 — When you allocate a block of memory in C, it usually tries to return you a block of consecutive addresses, for example, for msg[5], let's say the ... ,2014年5月2日 — It might appear to work , and then fail later on. For example it depends on what lies in memory after sentence1 as to whether your strcpy would ...
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 strcpy fail 相關參考資料
C++ strcpy function fails in few major cases - Stack Overflow
2018年10月10日 — In your program char a2[] = "Hello world";. defines a character array sized to fit the string literal "Hello world" . It can contain 12 characters ... https://stackoverflow.com strcpy() return value - Stack Overflow
2018年7月27日 — as Evan pointed out, it is possible to do something like char* s = strcpy(malloc(10), "test");. e.g. assign malloc()ed memory a value, without using ... https://stackoverflow.com Why does C's strcpy fail with doubly indexed arrays? - Stack ...
Because target[1] is a pointer to "bbbbbbbbbb" and you are not allowed to modify string constants. It's undefined behaviour. It's no different to: char *x = "bbb" ... ... https://stackoverflow.com Why does strcpy fail with char *s but not with char s[1024 ...
2012年6月12日 — Shouldn't the second variation also allocate 2 bytes of memory for s and thus have enough memory to copy "b" there? No, char *s is pointing to ... https://stackoverflow.com Why does this intentionally incorrect use of strcpy not fail ...
2011年8月22日 — First, copying into an array that is too small: C has no protection for going past array bounds, so if there is nothing sensitive at dst1[5..9] , then ... https://stackoverflow.com Why doesn't strcpy fail here? Deliberate - Stack Overflow
2020年10月5日 — When you allocate a block of memory in C, it usually tries to return you a block of consecutive addresses, for example, for msg[5], let's say the ... https://stackoverflow.com Why doesn't strcpy work? - Stack Overflow
2014年5月2日 — It might appear to work , and then fail later on. For example it depends on what lies in memory after sentence1 as to whether your strcpy would ... https://stackoverflow.com |