Compilare: user.cpp: In function ‘int strtoint(char*)’: user.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(C);i++) ^ user.cpp: In function ‘int potoint(char*)’: user.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(p);i++) ^ user.cpp: In function ‘int main()’: user.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(L);i++) ^