Compilare: user.cpp: In function ‘int rec(int, char)’: user.cpp:13:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p >= C.size()) ^ user.cpp:24:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p+4 >= C.size()) ^ user.cpp:35:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p+1 >= C.size()) ^ user.cpp:46:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p+2 >= C.size()) ^ user.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p+1 >= C.size()) ^ user.cpp:64:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(T >= C.size()) ^ user.cpp:70:1: warning: control reaches end of non-void function [-Wreturn-type] } ^