Compilare: user.cpp: In function ‘void afisare()’: user.cpp:53:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, lin, col; ^ user.cpp:53:15: warning: unused variable ‘lin’ [-Wunused-variable] int i, j, lin, col; ^ user.cpp:53:20: warning: unused variable ‘col’ [-Wunused-variable] int i, j, lin, col; ^ user.cpp: In function ‘int main()’: user.cpp:86:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.in", "r", stdin); ^ user.cpp:87:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.out", "w", stdout); ^ user.cpp:91:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &K); ^