1 /* Included from 20000628-1.h. This header is supposed to be seen 2 exactly three times. */ 3 4 #if !defined A 5 #define A 6 int a; 7 #elif !defined B 8 #define B 9 int b; 10 #elif !defined C 11 #define C 12 int c; 13 #else 14 #error Included a fourth time 15 #endif 16