Compilare: user.cpp: In function ‘void v1()’: user.cpp:15:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(sir)-1;i++) ^ user.cpp:17:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(sir[i]<sir[i-1] && sir[i]<sir[i+1] && i<strlen(sir)&& kstiva) ^ user.cpp: In function ‘void v2()’: user.cpp:29:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<strlen(sir);i++) ^ user.cpp:37:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=kstiva;i++) out<<stiva[i]; ^