Compilare: user.cpp: In function ‘int main()’: user.cpp:15:65: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] #define STDIN_FILE_OPEN(FileName) {freopen(FileName, "r", stdin);} ^ user.cpp:82:2: note: in expansion of macro ‘STDIN_FILE_OPEN’ STDIN_FILE_OPEN(IN_FILE_NAME); ^ user.cpp:16:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] #define STDOUT_FILE_OPEN(FileName) {freopen(FileName, "w", stdout);} ^ user.cpp:83:2: note: in expansion of macro ‘STDOUT_FILE_OPEN’ STDOUT_FILE_OPEN(OUT_FILE_NAME); ^ user.cpp:90:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &tests); ^ user.cpp:95:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:104:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nr); ^