Compilare: user.cpp: In function ‘int main()’: user.cpp:16:65: 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:21:2: note: in expansion of macro ‘STDIN_FILE_OPEN’ STDIN_FILE_OPEN("carte2.in"); ^ user.cpp:17:67: 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:22:2: note: in expansion of macro ‘STDOUT_FILE_OPEN’ STDOUT_FILE_OPEN("carte2.out") ^ user.cpp:26:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &tests); ^ user.cpp:31:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d", &a, &b, &c, &d, &e); ^