Compilare: user.cpp: In function ‘int main()’: user.cpp:37:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p=0;p<strlen(user[i].postari[j]);p++) ^ user.cpp:60:104: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { for(int l=strlen(user[i].postari[j])-nr+1;l<strlen(user[i].postari[j]);l++) ^ user.cpp:67:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(founduser) ^