1 #include <stdio.h> 2 3 int main()4 main() { 5 switch (1) { 6 case 1: if (0) 7 case 2: puts("hello"); 8 } 9 10 11 switch (1) { 12 case 1: if (1) 13 case 2: puts("gnu"); 14 } 15 } 16 17