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  1. #include <stdio.h>
  2.  
  3. struct S
  4. {
  5.     int i;
  6. };
  7.  
  8. void swap(struct S *a, struct S *b)
  9. {
  10.     struct S temp;
  11.     temp = *a    /* Oops, missing a semicolon here... */
  12.     *a = *b;
  13.     *b = temp;
  14. }
  15.  
  16. int main(void)
  17. {
  18.     struct S a = { 1 };
  19.     struct S b = { 2 };
  20.  
  21.     swap(&a, &b);
  22. }
  23.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.c: In function 'swap':
prog.c:12:5: error: invalid operands to binary * (have 'struct S' and 'struct S *')
     *a = *b;
     ^
stdout
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Standard output is empty
https://ideone.com/jaNv9B
Example showing error possible from the free-form C can have.
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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