Compilare: main.cpp: In function 'int main()': main.cpp:17:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(sir); ) ~~^~~~~~~~~~~~~ main.cpp:20:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i >= strlen(sir)) ~~~^~~~~~~~~~~~~~ main.cpp:48:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < wrong.size(); ++i) ~~^~~~~~~~~~~~~~