Compilare: user.cpp: In function ‘int main()’: user.cpp:13:11: warning: unused variable ‘m’ [-Wunused-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:13:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:13:17: warning: unused variable ‘nr’ [-Wunused-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:13:22: warning: unused variable ‘lm’ [-Wunused-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:13:25: warning: variable ‘la’ set but not used [-Wunused-but-set-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:13:28: warning: unused variable ‘nrc’ [-Wunused-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:13:32: warning: unused variable ‘p’ [-Wunused-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:13:34: warning: unused variable ‘nre’ [-Wunused-variable] int n,m,i,j,nr=0,lm,la,nrc,p,nre=0,nrw=0,pw,k; ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("weeee.in","r",stdin); ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("weeee.out","w",stdout); ^ user.cpp:15:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:16:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(si+1); ^ /tmp/ccKsSgUx.o: In function `main': user.cpp:(.text.startup+0x6a): warning: the `gets' function is dangerous and should not be used.