Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import <iostream> ^~~~~~ main.cpp: In function 'int main()': main.cpp:19:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<=N.length();i++) ~^~~~~~~~~~~~ main.cpp:23:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] x[i]==0?x[i]=11:0;if(i == N.length()) x[i] = 12; ~~^~~~~~~~~~~~~ main.cpp:9:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("telefon.in","r",stdin); ^ main.cpp:11:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("telefon.out","w",stdout); ^