why some code in sololearn run in my machine and others are not?

Answer 1

`gets` is considered unsafe as it doesn't allow us to specify maximum read buffer size (which could trigger buffer overflow) - unlike `fgets` (mentioned in tags) or `scanf`. I see most senior coders here (and out there) rather encourage the use of `fgets` over `scanf`.

I presume the warning you saw referred to that `gets` function?

http://www.cplusplus.com/reference/cstdio/gets/

http://www.cplusplus.com/reference/cstdio/scanf/

https://en.cppreference.com/w/c/io/fgets

Answer 2

You're welcome owel ✌

Answer 3

/* like the code below it works fine in sololearn compiler but when it comes in my laptop this could give a warning */

#include <stdio.h>

int main() {
char a[100];

gets(a);

printf("You entered: %s", a);

return 0;
}

Answer 4

Ipang thanks for the useful resources.