Compilare: user.cpp: In function ‘int main()’: user.cpp:95:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(c)==m-1) ^ user.cpp:97:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(c); j++) ^ user.cpp:107:14: warning: ‘col’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(lin,col); ^ user.cpp:107:14: warning: ‘lin’ may be used uninitialized in this function [-Wmaybe-uninitialized]