Compilare: user.cpp: In function ‘int main()’: user.cpp:390:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.in", "rt", stdin); ^ user.cpp:391:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.out", "wt", stdout); ^ user.cpp:393:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( S, NX, stdin); ^ user.cpp:397:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( R, NX, stdin); ^ user.cpp: In function ‘int OR()’: user.cpp:370:16: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ( a or b ); ^ user.cpp: In function ‘int AND()’: user.cpp:345:16: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ( a and b ); ^ user.cpp: In function ‘int SAU()’: user.cpp:358:17: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ( a + b == 1); ^