Thread: question about basic programming

In this case, you're lucky enough to get the decimal representation of the address in memory where "hello world" is stored.

> Just out of curiosity what happens if the place holder and the argument is not compatible?
Generally, all bets are off and you're on your own as to what the program may decide to do (or not do).

Pay attention to the warnings.

Code:

$ cat main.c
#include <stdio.h>
 
int main()
{
  printf("some text %d", "hello world");
  return 0;
}
$ gcc -Wall main.c
main.c: In function ‘main’:
main.c:5:10: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘char *’ [-Wformat=]
   printf("some text %d", "hello world");
          ^

Hello, Salem already answered your question beautifully. I just want to add one more little tidbit:

Generally, all bets are off and you're on your own as to what the program may decide to do (or not do).

Seems to often be called "Undefined behavior" (UB for short) in the community so if you ever hear that phrase come up or need to use it, there ya go! It just means that the C standard provides no definition as to what will happen and what will happen can vary on a case-by-base basis which obviously is a bad thing if you ever want to create usable software. I wanted to tell you because when I was brand new I kept hearing guys say "UB" and I didn't know what they were talking about.