Compilare: user.cpp: In function ‘int main()’: user.cpp:11:13: warning: unused variable ‘ef’ [-Wunused-variable] int n,m,ef,cod,c,Min=(1<<30); ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trecere.in","r",stdin); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trecere.out","w",stdout); ^ user.cpp:12:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:19:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd",&A[i][j]); ^ user.cpp:22:28: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] bool ok=0;int ap=0,poz; ^