Compilare: user.cpp: In function ‘int main()’: user.cpp:30:11: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,x=0,np=0,dim=0,nr=0; ^ user.cpp:30:17: warning: unused variable ‘np’ [-Wunused-variable] { int i,j,x=0,np=0,dim=0,nr=0; ^ user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("compresie.in","r",stdin); ^ user.cpp:32:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("compresie.out","w",stdout); ^ user.cpp:33:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s); ^