Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:42: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] int p=10,s,i,j,A,B,C,D,x[15]={-2},l;main(){std::ifstream c("telefon.in");std::ofstream o("telefon.out");std::string N;l=N.length();for(c>>N;i<=l;i++)x[i]=N[i]-48,x[i]?:x[i]=11,i-l?:x[i]=12;for(;j<15*x[j]>0;p=x[j++]){s=p-x[l]?x[j]:12;A=--p%3;B=--s%3;C=p/3;D=s/3;if(A<B)o<<" DR "<<B-A;if(A>B)o<<" ST "<<A-B;if(C<D)o<<" J "<<D-C;if(C>D)o<<" S "<<C-D;if(s-11)o<<" A ";}} ^ main.cpp: In function 'int main()': main.cpp:2:196: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] int p=10,s,i,j,A,B,C,D,x[15]={-2},l;main(){std::ifstream c("telefon.in");std::ofstream o("telefon.out");std::string N;l=N.length();for(c>>N;i<=l;i++)x[i]=N[i]-48,x[i]?:x[i]=11,i-l?:x[i]=12;for(;j<15*x[j]>0;p=x[j++]){s=p-x[l]?x[j]:12;A=--p%3;B=--s%3;C=p/3;D=s/3;if(A<B)o<<" DR "<<B-A;if(A>B)o<<" ST "<<A-B;if(C<D)o<<" J "<<D-C;if(C>D)o<<" S "<<C-D;if(s-11)o<<" A ";}} ~^~~~~~~~