ref: daf6c273125ec2b9c6776a0f715e0b5449fc997f dir: /tests/0005-ifstmt.c/
int main() { int x; int *p; int **pp; x = 0; p = &x; pp = &p; if(*p) return 1; if(**pp) return 1; else **pp = 1; if(x) return 0; else return 1; }