Example struct with 3 elements

[jwt@mal ~]$ cat derp.c
#include <stdio.h>

struct derp {
  int a;
  int b;
  int c;
};

int main() {
  struct derp herp =
  {.a = 1+2, 2+3, .b = 3+4, 4+5, .c = 5+6, 6+7};

  printf("a: %d, b: %d, c: %d\n", herp.a, herp.b, herp.c);

  return 0;
}
[jwt@mal ~]$ gcc -o derp derp.c
derp.c: In function ‘main’:
derp.c:11:44: warning: excess elements in struct initializer
   {.a = 1+2, 2+3, .b = 3+4, 4+5, .c = 5+6, 6+7};
                                            ^
derp.c:11:44: note: (near initialization for ‘herp’)
[jwt@mal ~]$ ./derp
a: 3, b: 7, c: 11