Compilare: user.cpp: In function ‘int main()’: user.cpp:13:9: warning: unused variable ‘n’ [-Wunused-variable] int n,m,i,j,ls,lt,pr,sf,cu; ^ user.cpp:13:11: warning: unused variable ‘m’ [-Wunused-variable] int n,m,i,j,ls,lt,pr,sf,cu; ^ user.cpp:13:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,ls,lt,pr,sf,cu; ^ user.cpp:11:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aparitii2.in","r",stdin); ^ user.cpp:12:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aparitii2.out","w",stdout); ^ user.cpp:14:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(si+1,nmax,stdin); ^ user.cpp:15:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(te+1,nmax,stdin); ^