Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:35:6: warning: unused variable ‘lac_patrat’ [-Wunused-variable] int lac_patrat=0; ^ user.cpp:52:6: error: ‘lac_patrat’ was not declared in this scope lac_patrat++; ^ user.cpp:9:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "lacuri.in", "r", stdin ); ^ user.cpp:10:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "lacuri.out", "w", stdout ); ^ user.cpp:14:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &n ); ^ user.cpp:19:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &mat[i][j] ); ^