I'm a beginner in C and I have a problem with passing a simple .txt content to a C program via terminal.

terminal line:

```
./uloh <tests/0000_in.txt

```

0000\_in.txt content is just a single digit "1"

C code (uloh.c)

```
#include <stdio.h>
int main (int argc, char* argv[])
{
    printf("Passed digit:\n%s\n", argv[1]);
    return 0;
}

```

terminal output:
Passed digit:
(null)

BUT!
if just call 

```
./uloh 1

```

then output is just fine. Can someone help me here?