Compilare: user.cpp: In function ‘int main()’: user.cpp:75:9: warning: unused variable ‘id’ [-Wunused-variable] int id = 0; ^ user.cpp:64:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:69:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &a, &b, &c); ^ user.cpp: In function ‘void compTranz(int)’: user.cpp:27:12: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] int x, y; ^ user.cpp:34:14: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] cf ^= (1 << x); ^