Compilare: main.cpp: In member function 'bool elem::operator^(elem&)': main.cpp:50:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:56:18: warning: unused variable 'nc' [-Wunused-variable] int n,i,nr,p,nc,auxnr,nr2,nr3,auxnr2,auxnr3,xc; ^~ main.cpp:57:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("calorifer.in","r",stdin); ^ main.cpp:58:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("calorifer.out","w",stdout); ^ main.cpp: In function 'char getChar()': main.cpp:13:28: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUF,LIM,1,stdin); ^