Compilare: user.cpp: In function ‘int main()’: user.cpp:40:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri2.in","r",stdin); ^ user.cpp:41:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri2.out","w",stdout); ^ user.cpp:43:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:46:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^ user.cpp: In function ‘void browse(int, int, int, int, int)’: user.cpp:34:61: warning: ‘yy’ may be used uninitialized in this function [-Wmaybe-uninitialized] browse(lvl + 1 , x + 1 , y + 1 , xx - 1 , yy - 1); ^ user.cpp:34:61: warning: ‘xx’ may be used uninitialized in this function [-Wmaybe-uninitialized]