Thread: What I 'm passing is address or value

I don't understand What I 'm passing is address or value in following code

Code:

 #include<stdio.h>

void foo ( int p )  
{
    printf(" %d", p);
}
 
int main(void) {
  
  int array[] = {1, 2, 3, 4, 5};
  
   foo(array);
    
    return 0;
}

I am passing address or value where it is written in main function or other function .

which line 3 or 12 define What I 'm passing is address or value ?

I believe line 12 pass something to function foo from main function

Well neither at the moment, since it doesn't compile.

Code:

$ gcc foo.c
foo.c: In function ‘main’:
foo.c:12:8: warning: passing argument 1 of ‘foo’ makes integer from pointer without a cast [-Wint-conversion]
   12 |    foo(array);
      |        ^~~~~
      |        |
      |        int *
foo.c:3:16: note: expected ‘int’ but argument is of type ‘int *’
    3 | void foo ( int p )
      |            ~~~~^

Consider one of

An address.

Code:

#include<stdio.h>

void foo ( int *p )  
{
    printf(" %d", *p);
}
 
int main(void) {
  
  int array[] = {1, 2, 3, 4, 5};
  
   foo(array);
    
    return 0;
}

A value.

Code:

#include<stdio.h>

void foo ( int p )  
{
    printf(" %d", p);
}
 
int main(void) {
  
  int array[] = {1, 2, 3, 4, 5};
  
   foo(array[0]);
    
    return 0;
}